Imperial Bearings are manufactured to inch sizes to meet the requirements of many older British machines and many current American manufactured applications. Available in 2RS (Rubber Sealed), Open (Non Sealed) & ZZ (Metal Shielded). Sizes range from R2 (KLNJ1/8) - R24 (KLNJ1-1/2). other sizes may also be available but may not be displayed please contact us if you require a size not displayed on our shop.