Rack Boom Attachment Model #SPR05 The Sound Percussion Rack Boom attachment fits over any 1-1/2″-diameter drum or cymbal rack tube and allows mounting of most popular cymbal boom arms. Shop now at the following retailers: PRODUCTS All-In-One SetsShell PacksSnare DrumsMarchingConcertPercussionVelocity Hardware ACCESSORIES Stands & Pedals Drum Practice Pads & Practice Mutes Bass Drum Impact Pads Replacement Parts Cymbal Holders & Arms Percussion Mounts & Stands Clamps Drum Keys Drumsticks SUPPORT Customer SupportFAQsManualsWarrantyPrivacy Policy FollowFollowFollow