Features Applicable for: Worm reducer, NMRV040 RV040 Nema34 stepper motor, etc. Alloy Steel Material: Resistant to pressure and corrosion, with high hardness and long service life High Performance: Stable transmission, low noise, good performance, and large bearing capacity Precisely Made: Diameter - 18mm, Length - 164mm, fine made with precise size Easy Installation: Plug and play, convenient to use Specification: Item Type: Worm Reducer Double Output Shaft Material: Alloy Steel Diameter: Approx. 18mm/0.71in Length: Approx. 164mm/6.46in Application: Applicable to worm reducer NMRV040 RV040 Nema34 stepper motor, etc. Package List: 1 x Worm Reducer Double Output Shaft 8 x Accessories Package List 1 x Worm Reducer Double Output Shaft 8 x Accessories