These Pulsar thick bottom bangers are a pure quartz nail with a beveled bucket opening that provides a 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. These bangers feature a 45 degree joint and have a 14mm joint size. The bucket inner diameter measures 13mm. Quartz Banger Features: Use: Concentrates Joint Size: 14mm Bucket Thickness: 5mm Bottoms Inner Bucket Diameter: 13mm Made with 100% Quartz 45 Degree / Beveled Edge