Features:T8 Anti-backlash nut for Acme threaded rod.Aplication: 3D printer Reprap Z axis, CNC, etc.Specifications:- Material: Brass- Color: Gold- Size: 50mm*22mm*14mm- Lead: 2mm / 8mm- Pitch: 2mmNote: Please choose the size according to your own needsPackage included:1 x T8 Anti-backlash Spring loaded Nut  ,,,,