Polaris Rear Brake Caliper Seal Kit - Repairs: 1910366, 1910441, 1910270, 1910367, 1910449, 1910553, 2201180, 2214281, 1910691, 1930818 Built to Polaris OEM Standards Repairs: 1910366, 1910441, 1910270, 1910367, 1910449, 1910553, 2201180, 2214281, 1910691, & 1930818 Does not contain the piston Dimensions: Large Seal: Inside 30.5mm - Outside 35mm / Medium Seal: Inside 21mm - Outside 26.5mm / Small Seal: Inside 1.5mm - Outside 8.5mm Shipped USPS FAST & FREE