- Pressure angle 20° - Materials: steel 20NCD2 (machined parts) Options - Alternative number of teeth (minimum 100 teeth for 0,4 module, mini 58 teeth for 1,0 module) - Alternative materials (stainless steel, brass..) Accessories - Spur gears with the same module ex G0,4..., ZG0,4...,G1, ZG1...