NON DEFORM:The bearing is made of high quality stainless steel, which is not easy to be deformed, strong,and has a long service life. STABLE PERFORMANCE:Ball bearings can improve the performance of the model car, add more fun to your remote control car, and have stable performance. COMPATIBLE WITH:High accuracy, perfect for the RC car model to replace the original part,fit for Tamiya Frog, for Super Blackfoot, and for Stadium Blitzer RC Car. FINE WORKMANSHIP:Special contactless double rubber seals can seal dirt while providing frictionless performance. LIGHTWEIGHT:Lightweight and portable,will not increase your RC car burden, giving you great user experience. Specification: Item Type:RubberSealedBearingKit Weight: Approx.19g / 0.7in Material: Stainless Steel Color: Blue Product Size: Approx.5 x 11 x 4mm / 0.2 x 0.4 x 0.2in (12pcs) Applicability: Fit For Tamiya Frog, For Super Blackfoot, And For Stadium BlitzerRCCar. Package List: 12 xRubber Sealed Bearing Note: 1. Please allow 01 inch error due to manual measurement. Thanks for your understanding. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the object.