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A bench-top fume extractor housing for any 40 x 40 x 10 mm fan — the fan bolts to the 60°-tilted face on its standard 32 mm M3 pattern (3.4 mm clearance holes with counterbores so the heads sit flush), and a 42 mm square of activated-carbon filter sheet press-fits into the 41.5 x 41.5 x 4 mm pocket in front of a ribbed finger-guard throat. Footprint 52 x 64 mm, 50 mm tall, with two M4 holes in the weighted base for bolting it to the bench and an open rear duct so exhaust clears the work.
A 120 mm replacement flush lever arm for a toilet tank, for when the brittle OEM arm snaps at the chain hole and the linkage isn't sold separately. Instead of guessing your handle's tab shape, a 14 mm deep forked jaw slides over the handle blade (1.5–3.6 mm thick) and pinches it with an M3×20 screw and a captured M3 nut; five 4 mm chain holes on a 12 mm pitch set the flapper chain length. Arm cross-section is 5 × 12 mm so the bending load runs along the print's strong axis.
A bolt-clamped replacement slider/holder for a 25 mm shower riser bar, for when the molded plastic holder cracks and the maker only sells the whole $60 rail. A 38 mm split ring with 6.3 mm walls grips the bar via two M5x30 bolts with captured nut pockets, and a 10°-tilted tapered cradle (26.4 mm top, 22.8 mm bottom, open through the bottom so it drains) holds the hand shower. Overall 90 x 39 x 32 mm.
A clamp-on double hook that saddles the top edge of a frameless glass shower door — towel hook on the outside, loofah/razor hook on the inside, no drilling, adhesive or suction cup. The 13.6 mm slot with a raised grip pad takes 6–13 mm (1/4"–1/2") tempered glass, and an M4 heat-set insert (5.5 mm bore) plus an M4x16 screw locks it down; 76 x 43 x 26 mm.
A stackable closet-flange riser for when new tile or vinyl leaves the toilet flange below the finished floor and the wax ring won't seal. 164 mm OD ring with a 110 mm bore that clears a 4" DWV throat, obround bolt slots on the 139.7 mm (5.5") closet-bolt standard, four 4.5 mm screw holes for #8 anchors, and a 1.5 mm tongue/2.0 mm groove so rings interlock and stack in 6.4 mm (1/4") steps. Print in PETG or ABS at high infill and stack as many as the gap needs.
A 104 x 46 x 16 mm bench dock that stands up 6 microSD cards (11 x 15 x 1 mm), 3 full-size SD cards (24 x 32 x 2.1 mm) and 4 USB-A flash drives parked plug-down in 12.8 x 5.4 mm bays, so the loose media around a Pi/camera bench stops disappearing into the parts bin. Cards protrude 7–20 mm for a one-finger pinch, a scalloped thumb groove backs the microSD row, and two M3 clearance holes on a 96 mm centre let you screw it into a drawer bottom or shelf; underside relief pockets keep it to roughly 57 cm³.
A split collar that clamps onto a standard 1/2" NPT shower arm (21.3 mm OD pipe) with one M4 screw into a heat-set insert, carrying two 30 mm upturned J-hooks for a loofah, razor strap or bottle handle — no suction cups, no drilling tile. Collar bore is 21.8 mm, ring wall 3.5 mm, overall 60 x 38 x 18 mm; slide it on with the shower head removed, then pinch the 3 mm gap closed to lock it.
A 140 x 95 mm riser shelf that slides in around a bathroom sink drain so the dead space beside the P-trap becomes usable storage — the 52 mm wide U-slot (26 mm end radius) clears common 1-1/4 in and 1-1/2 in tubular tailpieces and their slip nuts. Four hollow 18 mm legs give 45 mm of clearance over the cabinet floor, 7 mm drain slots let a drip pass straight through instead of pooling under your bottles, and each foot has a 4.5 mm M4 clearance hole if you want to screw it down.
A six-lane stadium-step rack that sorts cut heat-shrink tubing by diameter — troughs 8/10/12/14/17/20 mm wide take the common 3:1 sizes from 2.4 mm up to 12.7 mm, each 74 mm long with a finger scallop so you can pinch a piece out without emptying the lane. 116 x 99 x 39 mm overall, open underneath to stay light, with two M4 clearance ears (4.5 mm) to screw it to a shelf or bench back.
A 44 mm square block with four through-bores (18.7 mm, on 20.6 mm centres) that holds four 18650 cells upright, parallel and bottom-flush against the bench so nickel strip lands square during spot-welding or pack glue-up. Open-topped grab notches — one per cell, in 4-fold symmetry — let you spin a cell to set polarity, and two 5 mm ears with M3 clearance holes bolt the jig to the bench; overall 68 x 44 x 26 mm.
A screw-mounted holster that holds a hair dryer by its barrel in a 64 mm ring so the handle and cord hang clear of the counter. Plate is 62 x 62 mm with two 4.6 mm screw holes on 40 mm centers; the ring stands off the wall 36 mm.
A countertop vanity dispenser: a 61 mm tube that stacks standard cotton rounds with a full-height front slot so you can see the level and pull one out with a thumb, plus an attached 28 mm cup for cotton swabs. Footprint 98 x 66 mm, 82 mm tall.
A 100 mm wide wall rack that hangs four toothbrushes head-up in open keyhole slots so they drain and air-dry instead of sitting in a wet cup. Slots take handles from the top edge, and four screw holes mount it to drywall or tile.
A 147 mm staircase block that stands a 13-piece metric drill index upright, with bores from 1.5 mm to 7.5 mm rising left to right so the size order is obvious at a glance. Each step is taller than the last, so bit tips sit deep and shanks stay easy to grab.
A 100 x 72 mm bar-soap dish with a 3 mm sloped floor, five lengthwise ribs that keep the bar up out of the water, and a spout notch with a flat drip tongue that sends runoff into the sink instead of onto the counter.
A winding key that grips the flat tail of a toothpaste or ointment tube in a 3.2 mm slot; twist the finger-hole knobs to roll the tube up and push every last bit out. 96 mm long with a Ø7 mm hang hole in one knob.