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4 in Dust Hose Cam Lever Cuff
One-hand quick clamp for nominal 4 in flexible dust hose and tool ports: a 104 mm ID, 20 mm tall band with a 2.4 mm flexing wall and a print-in-place cam lever that draws the ears ~4 mm together, so it grips hose measuring 100–107 mm OD without a screwdriver. Replaces an expensive large-diameter worm clamp that kinks thin-wall hose; the spiral cam slot detents at the closed position and the lever pivots on a captured 5 mm pin.
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.