Product Description: Advantages: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Used with T8 screw rod, used to drive the optical axis slider for linear motion.4.Used for accessories such as 3D printing, CNC lathes, etc.5.Nut screw hole: M3 Top screw hole: M4 Aperture: 10mm.6.The item includes 2 pieces T8 Axis Nut Seat.Specifications:Material: AluminiumColor: SilverSize: 34x30x30mm/1.33x1.18x1.18Inch(LxWxH)Nut screw hole: M3Top screw hole: M4Aperture: 10mmWeight: 138 g Package include:2 x T8 Axis Nut seat Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin