-Durable and can be used repeatedly for a long time. -Made of high quality special materials. -Contain none of the harmful objects. -The rubber ring can prevent smoke and tar from leaking. -Remove tar while using for about 10 times. -Replace with an auxiliary rubber ring if damages. -Length : approx 140 mm/5.51" -Outer diameter : about 30 mm/1.18" -Inner diameter : about 17mm/0.66" -color Black + Dark RedSmokingPipeWooden