Descriptions: _x000D_Due to its small friction, the ball screw is the most commonly used transmission element in tool mechanics and precision mechanics. Its main function is to convert rotational motion into linear motion with high accuracy, reversibility and high efficiency. _x000D_ _x000D_Features: _x000D_1. Made of bearing steel, wearproof, anti-corrosion, rustproof and durable. _x000D_2. Low noise while running due to its small friction. _x000D_3. With high accuracy, reversibility and high efficiency. _x000D_4. Easy and quick to install without much effort. _x000D_5. Fit for RM1605, SFU1605 Ball Screw _x000D_ _x000D_Specifications: _x000D_Material: GCr15 Bearing Steel _x000D_Model: SFU1605 _x000D_Quantity: 2pcs _x000D_Hole Diameter: 16mm/0.63in _x000D_Size(L*W): 8*4.7cm/3.15*1.85in _x000D_Weight: Approx. 178g _x000D_ _x000D_Package Includes: _x000D_1 x Ball Nut _x000D_1 x Ball Screw Rod _x000D_ _x000D_Note: _x000D_Please allow 1-3mm error due to the manual measurement. Thanks for your understanding. 1Made of bearing steel, wearproof, anti-corrosion, rustproof and durable. 2Low noise while running due to its small friction. 3With high accuracy, reversibility and high efficiency. 4Easy and quick to install without much effort. 5Fit for RM1605, SFU1605 Ball Screw