Description 14mm Male Joint Size. 90° Angle. Marble Base On Banger. Very Large Bucket. This Quartz Banger is a 14mm male joint size and has a 90° angle. The bucket is about 1.5" tall and has a marble base where you would heat the banger. The marble base helps retain the heat longer compared to other bangers. This banger has a large bucket that would be perfect for terp pearls!