2 x Precision Aluminum Pulleys and 2 x Bearing Idlers for GT2 Timing Belt up to 6mm. Come with hex screws and tool

Pulleys:
Type: Flanged
Pitch: 2mm (GT2)
Number of tooth: 20
Outside Diameter: 16.00mm
Length: 16.00mm
Bore: 8.00mm 
Max Belt Wide: 6.00mm
Number of grub screws: 2

Idlers:
Type: Flanged
Pitch: 2mm (GT2)
Number of tooth: 20
Flange Diameter: 18.00mm
Height: 9.00mm
Bore: 5.00mm
Max Belt Wide: 6.00mm
Bearing: 2 x MR95ZZ (5 x 9 x 3mm)

Stepper Motor and Timing Belt not included