Skip to content
Close (esc)

Sign up for emails to be the first to know about new products and sales!

15% off for new subscribers

Age verification

YOU MUST BE 18+ TO ENTER THIS WEBSITE

21+ for Arizona, California, Illinois, Kansas, Massachusetts, Mississippi, Missouri, New Jersey, New York, Hawaii, or Ohio.

By entering this site, you confirm that you are of legal age to purchase these products in your area.

Sonnumberfour Bubble Caps

Regular price $100.00

Shipping calculated at checkout

Color
Size

Sapphire and ruby expand when heated please note that not all quartz nails are exactly the same internal diameter. There must be at least 1mm of space in between the insert and the wall of the quartz nail or the quartz and/or insert WILL break.

  • 19mm insert requires a quartz banger with a minimum internal diameter of 20mm from top to bottom. 22mm insert requires a 23mm internal diameter from top to bottom.

Know your quartz internal diameter before use!

In stock

Designed with the perfect restriction to prevent spillover when paired with Adapt Tech Gem Inserts without compromising the function of your rig. An excellent accompaniment to any set up.

1 of 1 ready to ship:

Silver fume + Gold Amethyst collab with @iansglass

Egyptian Green + Karmaline (faceting by @lazy.summer.days)

Please allow 7-10 days for shipment as each is made to order

10 days for custom faceted caps

Customer Reviews

Based on 27 reviews
100%
(27)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
H
Harry K.
Bubble cap

Yes it’s calibrated for perfect functionality with inserts!!💨💨💨💨💨🤙

D
Devin O.
Perfect

Flawless design/ function.

C
Christopher L.
SN4 Bubble Cap

Seals very well and the short nozzle pairs nicely with the Adapt Tech

R
R.G.
Still my favorite bubble years later

I've had this bubble cap in clear ever since my first gem (18mm at the time) and I haven't been able to find a comparable bubble cap ever since. It's that good. Minimal splashing every time with the perfect amount of restriction. Beautiful to look at too, I love the handle.

r
richie g.
Son4bubble cap

Gives the most restriction needed to keep your precious rosin inside the insert/ less splash!

Shopping Cart