Weight: 655g Material: steel Applicable age: Children Item name: Bicycle training wheels Specification: fits 12-20 inch bicycle wheels Package include: 1* set of bicycle training wheels Contains: 1* pair of training wheels+2* screw+2* screw cap+2* spacer +2* wheel's bracket Note: As different computers display colors differently, the color of the actual item may vary slightly from the pictures. Hope you understand