[Toplan] 10T Plastic Bike Bearing Jockey Wheel Rear Derailleur Pulleys***************************Welcome to our Toplanswatchstore****************************Features: High quality of materials. This roller is an accessory for bicycle derailleur. Features: It is universal and suitable for majority of 10-tooth rear derailleur. Durable,useful,lightweight. Specification: 1.Material: Plastic 2.Type: 10-tooth 3.Color: Black,Red 4.Size: As Picture Shows 5.Quantity: 1 PC Note: 1.Please allow 0.1-0.3cm differences due to manual measurement, thanks. 2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same.