Swivel Blowpipe adjustable to angles for more comfortable playing. Turned from solid delrin for durable construction. The blowpipe has a 3/8″ bore. Sturdy, replaceable built in valve. Standard mouthpiece thread diameter, so your own mouthpiece can fit the blowpipe. Latex sleeve included The length of a blowpipe is taken from the mount to the tip.The length does not include the tenon (the hemped part).