This ergonomic butterfly valve handle is designed to slip directly over standard manual “butterfly” valve knobs (commonly found on heating radiators, towel warmers, and plumbing systems) to give you better grip and leverage—no tools needed!

✅ Fits standard ½" radiator valves
✅ Internal dimensions:
 – Central hub diameter: 24 mm
 – Total width (tip to tip of wings): 53 mm
✅ Easy snap-on installation—no screws or adhesives

✅ Pro tip: Print with a textured or rough outer shell (e.g., using “fuzzy skin” in Cura or similar settings) to prevent slipping—especially useful with wet or cold hands!
✅ Comfortable, tool-free operation—great for elderly users or tight spaces
✅ Optimized for 3D printing (no supports needed, minimal overhangs)

Print it in PLA, PETG, or ABS—PETG recommended for durability and heat resistance near radiators.

Note: Always check your valve dimensions before printing. This design fits the common “butterfly” knob with a 24 mm central disc and 53 mm total wingspan.

—
Print Settings (Suggested):
• Layer height: 0.2 mm
• Infill: 100%
• No supports required