This Pulsar Quartz Thick Bottom Banger is a pure quartz nail with a beveled bucket opening that provides an tight air seal with the user's carb cap for more effective vaporization. The bucket has a 5mm thick bottom quartz disk that retains heat and holds it over a longer period of time. Features a 90 degree joint and comes in 10mm & 14mm joint sizes. Bucket inner diameter measures 13mm in diameter. 90 degree quartz banger Beveled edge 5mm thick bucket bottoms 13mm inner bucket diameter Multiple joint sizes Made with 100% quartz