*.58Pcs Plastic Gears Set Shaft Motor Gear Robot Kits Hot~ Toy DE H9X7
58Pcs plastic shaft single and double reduction crown worm gear robot parts DIY. You can follow below process to chontact us. Size: Modulus 0.5, inner holes are 1.9mm, 2.05 (2.0) mm, 2.4 (2.55) mm, 2.9 (3) mm.