BOFA - 50mm ( 2in ) balancing valve you will need 2 if you are using the t splitter for Bofa dust collector hose to hook up multiple Devices to dust collector price is each #1UA108003
Description
BOFA - 50mm & Splitter
DUST COLLECTORS ACCESSORIES
421067 – Mfg # A1080088
Features:
BOFA DUST collector to hook up multiple Devices to DUST collector