GT2 Closed Timing Belt (686mm Length-6mm Width) N129

Timing belts are a fantastic way to transfer rotational motion (from a stepper motor) into linear motion (along a rail) and these GT2 belts are excellent for the task. They have a special profile with rounded teeth which reduces slippage. Often used for precision 3D printers and CNC machines. 
This belt is 686 mm long  and is 6mm wide. It comes in a loop but you can of course cut it down if you need a shorter length.

Pitch:       2 mm
Width:      6 mm
Length:   686mm