The Kubota W21CK00372 is a genuine 1000-hour service kit designed specifically for Kubota U27-4 mini-excavators with serial numbers below 57196. This comprehensive kit ensures optimal performance and longevity by providing all necessary filters for routine maintenance. It includes the engine oil filter (HH16432430), fuel filter (1G31143380), outer air filter (RC60142280), inner air filter (RC60142290), hydraulic filter (RC60142240), and cabin filter (RC60142270), all manufactured to Kubota's stringent OEM standards. Regular use of this service kit helps maintain engine efficiency, fuel cleanliness, hydraulic system integrity, and cabin air quality.