Premium quality aftermarket and OEM-compatible seal kits engineered specifically for Kato construction equipment. Designed for excavator models including HD series (HD512, HD513, HD700, HD800, HD800SEV, HD880SEII, HD1023, HD1430, HD1880, HD2045) and crane models (NK series, KR series).Applications include excavator boom cylinder seals, arm cylinder seals, bucket cylinder seals, track adjuster seals, swing motor seal kits, travel motor seals, hydraulic pump seals, and crane hydraulic seals. Direct replacement for OEM part numbers including 309-75500001, 329-12090000, 329-18990001, 329-26190001, and more. Perfect for heavy-duty construction, mining, and demolition environments.