??This is 18034 Upgrade Parts Wheel Mount Ball Bearings for 1/18 RC cars.

Description:
Suit for Yikong RC cars.
Materials: metal.
1set: 6Pcs
Package Size: 5 * 3 * 1cm / 2 * 1.2 * 0.41in
Package Weight: 8g / 0.3oz
Adhesive Tap Package

Package List:
1 * 18034 Wheel Mount Ball Bearings