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LIFETIME WARRANTY

Upgrade to lifetime warranty

Lifetime warranty added

Every item in your order, up from 2 years.

Every item in this order is covered for life.

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International orders may owe duties or VAT on delivery. Learn more

30-day returns 4.7 · 900+ reviews Designed in Oregon

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BitWhip Accessory
From $29.95
Light Painting Tube
From $24.95
BitWhip Travel Case
$29.95
Critter Connector
$24.95
AOAM Pull-String Bag
$12.95
Sparkler Holder
$14.95
RGB Critter BT Light Engine
$149.95
RGB Critter Travel Case
$19.95
Fiber Optic Duster -⁠ Black
$19.95

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Modular End Cap, black silicone with aluminum thread
Back end of the RGB Critter BT Light Engine showing the modular end cap
Modular End Cap, black silicone with aluminum thread
Back end of the RGB Critter BT Light Engine showing the modular end cap

Modular End Cap

Soft silicone cap that takes the hits for your parts.

Soft silicone cap that takes the hits for your parts.

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The Modular End Cap is a soft, impact-resistant silicone cap that protects your RGB Critter and modular saber parts from drops, bumps, and rough handling. It twists on and hand-tightens, no tools needed.

Where it fits

Those two threads are the complete list. The cap does not fit the front of the RGB Critter or the open end of a saber tube.

Price$19.95
Regular price
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30-day returns

Shipping to Turks & Caicos Islands is quoted by UPS or DHL at checkout. Free shipping is US only, so the rate is added at the shipping step. Shipping policy.

4.7 · 900+
reviews
30-day
returns
Designed
in Oregon
Goes great with itAdds with Add to Cart
BitWhip whip head BitWhip whip head14 types
from$29.95
O-Ring O-Ring2 o-ring sizes
$0.25
All Critter accessories46 twist-ons
Item $19.95 $19.95

2-year warrantyDefects in materials or workmanship are covered for 2 years from the date of purchase.

Lifetime upgrade in the cartAdd it and every item in the order is covered for as long as you own it. Batteries are covered for 60 days.

Free 30-day US returnsUnused and in the original packaging, and we email you a prepaid label. International returns are accepted within 30 days, return postage is yours.

Broke in use?That is a warranty claim, with no 30-day limit. Email support@antsonamelon.com and we repair or replace it.

Full warranty policy  ·  Full return policy

More to explore:

Blades, tubes and caps explainedAugust 10, 20266 min read Every Critter accessory explainedJune 13, 20265 min read All twist-on accessoriesShop the collection
See all
Modular End Cap
Modular End Cap
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  • 5 stars: 2 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
Some of the reviews shown are from related products the merchant grouped with this one.
R
Rey Florendo (Honolulu, US)
Modular Cap

Nicely done soft and durable

S
Sebuh Honarchian (Glendale, US)
Best

Good stufff

Need a Hand?

No bots. No runarounds. Just real answers from the team that built it.

Need a Hand?

RGB CRITTER FLOW KITS. BUILT for performance.

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Explore light toys powered by the versatile RGB Critter BT color-changing flashlight. These twist-on accessories, including fiber optic whips, light sabers, and more, easily attach for next-level flow.

BitWhip Fiber Optic Whip Kit

4.7173 reviews, rated 4.7 out of 5

Light + twist-on fiber whip, 140 to 300 fibers

From$159.95Regular price $179.90
Kit saves $19.95
VIEW THIS KIT

Light Painting Photography Kit for Beginners

4.824 reviews, rated 4.8 out of 5

10 tools in the box, light included

$199.95Regular price $319.60
Kit saves $119.65
VIEW THIS KIT

Fiber Optic Costume Kit

4.828 reviews, rated 4.8 out of 5

Light + wearable fibers, 6 to 12 ft

From$189.95Regular price $209.90
Kit saves $19.95
VIEW THIS KIT

Double BitWhip Fiber Optic Whip Kit

4.916 reviews, rated 4.9 out of 5

Two lights, two whips, one Connector

From$309.95Regular price $384.75
Kit saves $74.80
VIEW THIS KIT

LED Staff Kit

4.810 reviews, rated 4.8 out of 5

Two lights + tubes, 23 to 83 in staff

From$304.95Regular price $464.65
Kit saves $159.70
VIEW THIS KIT

Light Painting Pro Kit

4.910 reviews, rated 4.9 out of 5

Two lights and nearly every tool we make

$971.95Regular price $1,280.75
Kit saves $308.80
VIEW THIS KIT

Light Painting Starter Kit

5.03 reviews, rated 5.0 out of 5

One light plus a deeper light painting toolset

$421.95Regular price $582.00
Kit saves $160.05
VIEW THIS KIT

Jupiter Rope Kit

4.812 reviews, rated 4.8 out of 5

Six feet of color-changing rope, light included

$169.95Regular price $189.90
Kit saves $19.95
VIEW THIS KIT

Saber Kit

4.847 reviews, rated 4.8 out of 5

Light + saber tube, 4 patterns, 6 lengths

From$179.95Regular price $259.80
Kit saves $44.85
VIEW THIS KIT
Shop all Kits

Added To Cart

Complete your setup:

International Shipping Restriction

This lithium-ion battery cannot be shipped internationally and cannot be added to your cart.

You can purchase the required battery locally with these specifications:

  • 18650
  • Lithium-ion
  • 3.6V nominal
  • Unprotected
  • Flat top
  • 18.3mm diameter × 65.0mm length

Do not purchase protected, button top, 3.2V, or 1.5V cells.

Ants on a Melon is not responsible for batteries purchased from third-party sellers. Please verify specifications and use only high-quality lithium-ion cells from reputable brands.

LIFETIME WARRANTY
Every item in your order, for life.
Our gear comes with a 2-year warranty. This upgrade extends every item in your order to lifetime.
WHAT YOU ALREADY GET
2 years on everything in your order, free. Batteries have their own 60-day warranty.
WHAT THIS ADDS
If anything in this order fails from a defect, we repair or replace it for as long as you own it.
NO HASSLE CLAIMS
Email us photos or a short video. Most repairs are back out in 2 to 3 working days.
NOT COVERED
Drops, a cracked housing, loss, theft, broken fiber strands and normal battery wear.
International duties & VAT
A quick heads-up for orders shipping outside the US.
Set by your destination
Import duties and VAT are charged by your country's customs, not by Ants on a Melon.
Paid on delivery
Your carrier collects any charges when they deliver. Amounts vary by country.
Still fully guaranteed
Every international order is guaranteed to arrive. Need help? Email support@antsonamelon.com