M0.5 worm gears, metal, copper, length 10mm, 12mm, hole diameter 1.98mm, 2.28mm, 2.98mm

M0.5 training worm

Module: 0.5, price are for 1PCS

Hole diameter 1.98mm: outer diameter 6mm, length 10mm.

Hole diameter 2.28mm: outer diameter 7mm, length 12mm;

Hole diameter 2.98mm: outer diameter 7mm, length 12mm;