9mm Shell Casing Tire Valve Stem Caps

Turn your spent brass into custom automotive accessories. This precision-engineered insert presses into a standard 9mm Luger shell casing, allowing it to screw onto any standard Schrader valve stem (cars, trucks, motorcycles, and bicycles). Designed with a focus on functional product design and a minimalist aesthetic, these inserts provide a secure, threaded fit. Design Features Precision Fit: Optimized for the internal diameter of standard 9mm brass casings. Schrader Compatibility: Deep, clean internal threads ensure a smooth fit on all standard tire valves. Minimalist Profile: The insert remains hidden once installed, maintaining the authentic look of the brass. Print Settings For the best results and functional durability, use the following profile: Material: PETG or ABS (recommended for UV and heat resistance on wheels). Nozzle: 0.4mm or 0.2mm for maximum thread clarity. Orientation: Print with the wide "base" facing down on the build plate. Assembly Instructions Prep the Brass: En