CYMBAL BOOM ARM-B1-VRC The head is suitable to

The head is suitable to be used with all the standard 18'' acoustic drum rims in use today

it is used to split stereo module inputs

It is a  combination of a single mounting block on the bass drum

* To use with 6mm tension rods

* 2x8''  2x10'' 1x14''

CYMBAL BOOM ARM-B1-VRC The head is suitable toA new chrome cymbal boom arm B1 VRC with a vertical metal rack clamp, the clamp fits all the standard 1. 5'' rack tubes. The combination is suitable to be used with both acoustic and electronic cymbals. * 22mm tube size. * Tube length 38cm boom length 46cm. We have a few different boom arm versions, some with metal or nylon rack clamps or stand clamps you can view them in our other listings.