The Pulsar Quartz Thick Bottom Banger is 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. Features a 45 degree joint and comes in 10mm & 14mm joint sizes. Bucket inner diameter measures 13mm in diameter.