Premium quality aftermarket and OEM-compatible seal kits engineered for hydraulic breakers, excavators, and heavy construction equipment. Designed to fit major brands including Furukawa, Caterpillar, Komatsu, Hitachi, Kobelco, Volvo, Doosan, Hyundai, and Rockbreaker. Features high-performance materials including polyurethane (TPU), nitrile rubber (NBR), fluorocarbon (Viton/FKM), and HNBR for superior oil resistance, high pressure tolerance, and extreme temperature performance from -40°C to +200°C. Each kit includes all necessary O-rings, piston seals, dust seals, oil seals, diaphragms, backup rings, and wipers for complete repair and maintenance. Ideal for hydraulic breaker rebuild, excavator cylinder repair, and heavy machinery restoration. Direct replacement for OEM part numbers with guaranteed fitment and durability. Available for all sizes from mini breakers to large mining hammers.