Description This Oldham coupling is made of brass, which reduces friction and has sufficient strength. CNC machining controls the clearance at the connection location. The use of this shaft coupling for the Z-axis screw of the 3D printer will reduce the printing quality problems caused by the swing of the hot bed during the printing process. Compatible VzBot 3D Printer Blv 3D Printer 3D Printer Using T8 Screw For Z Axis Product material: Brass Package include: 1 piece coupling