Non-Standard 25x40x9/10 Special Size Sealed Bearing 25mm x 40mm x 9mm or 10mmNon Standard Sealed Ball Bearing 25mm x 40mm x 9mm or 10mm Chrome Steel One Bearing This non standard sealed ball bearing features a 25mm inner diameter and 40mm outer diameter, with a width that may vary between 9mm and 10mm depending on stock. Made from durable chrome steel, its pre lubricated and sealed (rubber or metal) for use in unique or custom mechanical setups. Size: 25mm inner x 40mm outer x 9mm or 10mm width Type: Non standard deep groove