Features EASY INSTALLATION: Come with accurate size, simple installation, plug and play, more convenient for you to use CORROSION RESISTANT ALLOY STEEL: Alloy steel material, pressure and corrosion resistant, possess high hardness, long service life MANY ADVANTAGES: Output shaft come with smooth transmission, low noise, good performance, large bearing capacity WITH FITTINGS: Equipped with 7 accessories, easy for you to install and use, complete accessories guarantees convenient operation WIDELY APPLICABLE: Suitable for worm reducer NMRV040 RV040 Nema34 stepper motor, etc., very versatile Specification: Item Type: Output Single Shaft Product Material: Alloy steel Diameter: Approx. 18mm / 0.71in Length: Approx. 128mm / 5.04in Scope of Application: Suitable for worm reducer NMRV040 RV040 Nema34 stepper motor, etc. Package List: 1 x Output Single Shaft 7 x Accessories Package List 1 x Output Single Shaft 7 x Accessories