What's in the box:

Aibecy 6pcs 3D Printer Parts POM Pulley Wheel 625zz Idler Pulley Gear Passive Round Wheel Compatible with Creality Ender 3 CR-10 CR-10S (1)

Specifications:
Color: Black
Quantity: 6pcs/10pcs/20pcs(optional)
Material: POM/Delrin
Outside Diameter: 24mm
Bore Diameter: 5mm
Thickness: 10.2mm
Bearing: 625zz
Item Size(1pc): 24 * 24 * 10.2mm / 0.9 * 0.9 * 0.4in
Item Weight(1pc): 13g / 0.5oz

Note:
Due to manual measurement, the error of 1-2mm is normal.

Packing List:
6 * POM Wheel