The first picture is a product picture, the other pictures are sample displays Description: Brand new and high quality Bike Cycling Aluminium Jockey Wheel Rear Derailleur Pulley 11T Teeth: 11T Bearings: Upgraded RS bearing. Design for outdoor Bike Specifications: Type: 11 Gear Guide Pulley Color: Black, White, Blue, Red, Yellow, Purple Material: Aluminium Size: 5mm (D) Net Weight: 9.8g Package Included: Wheel Rear Derailleur Pulley (11T)*1 Notes: Please check the detail size/model information before purchasing. Due to the different monitor and light effect , the actual color of the item might be slightly different from the color showed on the pictures . Thanks for your understanding. Please allow 1-2 cmmeasuring deviation due to manual measurement. Chat with us should you need any assistance.