Product Description Compatibility:M4 as of 2002 model (2 x as replacement for the large piston seals; for the small caliper pistons, 2 seals with the manufacturer number HBSP125 are required)Mono M4 2004 and 2007 models (2 x as replacement for the large piston seals; for the small caliper pistons, 2 seals with the manufacturer number HBSP125 are required)Mono M4 as of 2009 model (4 piston seals are required)V4 as of 2013 model (2 x as replacement for the small piston seals; for the large caliper pistons, 2 large piston seals with manufacturer number BHSP299 are required)E4 as of 2013 model (4 piston seals are required)Features:piston seal as spare part for maintenance of various disc brake modelsreplaces one of the seals mounted in the brake caliper on the caliper pistonstwo or four piston seals required depending on modelManufacturer Number:HBSP068 Contents:1 x Manufacturer: Hope Mill Calf Hall Road Barnoldswick Lancashire BB18 5PX United Kingdom info@hopetech.com Distributor: bc GmbH Carlo-Schmid-Straße 12 52146 Würselen Germany info@bike-components.de