The JW 275 aluminum case fits two trumpets with perinet pistons. The outer shell is made of 6mm thick plywood laminated with a durable anodized aluminum surface and integrated black corners. The JW 275 is also suitable for a single trumpet with a big damper. Carrying is easy with strong top and side handles.Year after year, more and more musicians, societies and institutions entrust their musical instruments to the uncompromising quality and safety of Jacob Winter musical cases.