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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.
A weather cap for a nominal 4x4 fence or deck post (88.9 mm actual) with a 91 mm square socket, 20 mm engagement and two M4 clearance holes so it screws down and won't blow off. Twin horns on opposite faces carry a cafe-string-light cable in an 8 mm wide, 10 mm deep slot; overall 127 x 97 x 50 mm with a hollow 50-degree pyramid roof that sheds water and prints support-free.
A 90 mm V-jaw layout plate that drops over the end of any round bar, dowel or pipe from about 9 to 70 mm diameter; scribe through the long centre slot, rotate the stock 90° and scribe again — the crossing point is dead centre. The 8 mm deep V lips self-centre the tool so it can't rock off the end face.