22810-P21-0030 Nachi Self-Aligning Clutch-Release Bearing 22810-P21-0030 = NP-55SCRN41P-6 One Bearing Made in Japan 22810-P21-0030 Nachi Self-Aligning Clutch-Release Bearing, inner diameter is 35mm, outer diameter is 55mm and the width is 24mm.