Gator Cases Protechtor Series Classic Tom Case; Fits 20"x 18" Bass Drum (GP-PC2018BD) Recognized as the industry standard rotationally molded drum cases Provides strength, durability, and simplicity for almost any drum size The rotational molding process gives added strength and durability to case corners and provides water resistance that non-roto molded cases can't match Custom depths and colors are available Comes with a limited, lifetime warranty against cracking