Milwaukee 4931436557 O-Rings Set of 5 For M18CHX, M18CH-502C, M18BLH, M18BLHX

Milwaukee 4931436557 is a genuine replacement O-ring (often sold in a set of 5) for several high-performance Milwaukee cordless hammers, including:
M18 CHX: 4-Mode SDS-Plus Hammer with FIXTEC™ chuck
M18 CH:  26mm SDS-Plus Rotary Hammer
M18 BLH: 18V Brushless SDS-Plus Hammer
M18 BLHX: 18V Brushless SDS-Plus Hammer with FIXTEC™ chuck