One Way Hexed Head Bearing, Backstop Clutch, One Way Bearing or Anti-Reverse Bearing. Instant Anti-Reverse One Way Roller Clutch Bearing Plastic Springs
Do not add any grease
Verify size of bearing prior to purchase for these manufacturers part# Shimano Part # BNT1813, P98B-420G Daiwa Part # F58-0601, F40-8001, 140-1370, 114056, 6G220601 Koyo Part # 1010TF4