Product features Product Name : Deep Groove Ball Bearing Model :6305-2RS Brand: NACHI MADE IN JAPAN Inner Diameter : 25mm; Outer Diameter:62mm; Width :17mm Material : Metal Package Content : 1 x Deep Groove Ball Bearings Product description This is a popular size that could be used in many RC Cars and Trucks or any application that uses.Bearing is made of metal, each bearing has 2 metal or rubber shields to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease. .