These Borosilicate Glass CBD/THC 510 1ml/4ml Cartridges are perfect for all thick THC/CDB concentrates such as distillates live resin/rosin. what are 

Features:
Cartridge Volume: 4ML
Resistance: 1.4Ω
Ceramic heating element
Snap-fit/screw-on mouthpiece
Low-lead brass center post
Borosilicate glass body

It Includes:
1x Borosilicate Glass CBD/THC 510 1ml/4ml Cartridges

4ml Option May Have White Or Black Tops