This product is hollow tubular process accessories, can not be used for e-cigarettes and accessories, This product does not contain any tobacco and liquid ingredients. Please pay attention to the size of the interface The outer diameter of 810 model is 12.5mm, and that of 510 model is 8.5mm Please use it in the right place.POM anti scald cigarette holder

510 size: outer diameter 11mm, height 16mm, interface 8.5mm

810 size: outer diameter 16mm, height 18mm, interface 12.5mm