Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
Mini-Split Line Set Wall Penetration Hood
This is an open-bottom wall hood for a DIY ductless mini-split install. It covers a 2-1/2 to 3 in (64–76 mm) line-set hole, and the top of a line-hide duct up to 100 mm wide and 38 mm deep slides up under its open end. The hood is 106 x 128 x 42 mm with 2.4 mm walls. It mounts with three #8 wood screws (4.8 mm bores) through posts you drive through from the front, so you don't need a brand-specific inlet cap from a bundle kit.
Furnace Filter Swing-Aside Spring Retainer Clip
A 16 mm wide flex-finger clip that screws next to a furnace or return-air filter slot with one #8 or M4 screw (4.5 mm hole). It holds filters up to 24 mm thick (standard 1" nominal) with a sprung pressure nub, and the lift lip at the tip lets you flick it aside without tools when you swap the filter. It replaces the lost or broken sheet-metal turn-buttons on filter doors. The finger flexes in the layer plane, so it won't split along layer lines. Overall size is 70 x 32 x 16 mm.
Universal V-Jaw Duct Damper Lever
A 110 mm replacement handle for a round-duct balancing damper whose stamped lever has snapped off. The 28 mm hub has a 90° V-jaw that takes any 5–10 mm round or square damper shaft, clamped by an M4 set screw in a heat-set insert. A rib along the top lines up with the damper blade so you can see its setting, and a 4.5 mm tip hole lets a #8 sheet-metal screw lock the setting to the duct.
Parametric 4x4 in Drop-In Register Grille
A drop-in wall or ceiling register grille for a 4 x 4 in (101.6 mm) duct opening. Use it when a duct resize or drywall job leaves a hole that no store-bought cover fits. It has a 132 mm square face, a 98 mm locating skirt that leaves 1.8 mm of play per side, 3.5 mm straight-through slots stiffened by 9 mm deep vanes, and two countersunk 4.6 mm holes for #8 wood screws (4.2 mm shank) or M4 screws. Change OPEN_W and OPEN_L at the top of the script to fit other opening sizes.
Register Vent Air Deflector Clamp
A 150 mm wide, 50°-angled deflector blade that screw-clamps onto the outermost louver fin of a floor, wall or ceiling HVAC register to throw supply air away from curtains, a bed or a sofa instead of straight up the wall. Two clamp posts take an M4 heat-set insert (5.5 mm bore) and an M4 set screw that pins any fin up to 12 mm thick against an 8 mm anvil, so it works on stamped steel and moulded plastic registers alike — unlike magnetic deflectors that slide off. Blade is 2.6 mm thick with three full-length stiffening fences; overall 150 x 69 x 66 mm, prints rail-down with no supports.