Durable Borosilicate Glass: Crafted from high-grade borosilicate glass

The sandblasted finish lends a unique texture

mimicking a mystical crystal ball in action

while their patented watermark system and cross-weave patterning prevent runs and ensure an even burn

Thick Bowl for 14 mm joint

Pulsar RoK Concentrates Bullet Carb Cap | Full Spectrum cap Durable Borosilicate Glass: Crafted fromThis bullet style carb cap for the RK Full Spectrum is made with iridescent borosilicate glass and measures 21mm in diameter and 42mm tall. Made for use with the XL Cloud Collar. Provides an excellent air seal with the beveled edge of the silicone collar. The cap can also be used with a variety of banger nails. Note: The cap has an extended nipple that will not allow it to work with the standard silicone collar that comes with the your original RK