Protec Bb & A Double Clarinet Slimline PRO PAC Case, Model PB307D Soft molded interior accommodates Bb and A clarinets, 4 barrels, nonabrasive velvoa lining, and small accessory interior compartment Slim lightweight shock absorbing frame, weather-resistant 1680 ballistic nylon exterior, and large rear-side sheet music pocket Dual-corded handle design with padded handle wrap, subway rope handle, removable padded shoulder strap featuring an I.D. tag, backpackable with optional backpack strap (model #BPSTRAP, ASIN B0002KX5E6) Large front-side zippered pocket with built-in organizer with two interior sleeves to hold pens, keys, and small accessories QuickLock allows you to securely shut an empty case without zippering, custom strong metal hardware, long lasting custom molded zippers, and durable molded rubber feet