Contoured Tenor Trombone PRO PACS fit virtually any tenor. Fits most f-attachments and bells up to 8.5". Controured Bass Trombone PRO PACS fit up to 10.5" bells, open/close wrap. Exterior Features: Durable 1000 denier nylon; water and abrasion resistant Roomy exterior pocket Brass plated hardware High quality YKK zippers Interior Features: Lightweight shock absorbing frame; contoured design Soft velvoa lining to protect the finish Comfort & Convenience: Padded handle grip secured by Velcro Velcr