Shop Vac Blast Gate 2.5 in
A print-in-place slide blast gate for 2-1/2 in (63.5 mm) shop-vac and dust-collection duct — the gate plate rides in a 45° dovetail channel so nothing needs supports and it can't lift out, and a moulded floor ridge snaps it at the closed position. Body is 133 x 92 x 13.4 mm with a 63.5 mm through bore and four 4.5 mm M4 clearance holes on a 64 x 82 mm rectangle for screwing to a duct flange, backing board or machine port.
garage blast-gate dust-collection shop-vac