The Cat 1R0721 is a genuine Caterpillar Standard Efficiency Hydraulic Filter designed to effectively remove contaminants from your hydraulic system. Featuring a durable cellulose media, this spin-on filter ensures reliable performance, protects critical components, and extends the service life of various Cat machinery. With an outer diameter of 93.7 mm and a length of 174.5 mm, it provides essential filtration for demanding applications in excavators, wheel loaders, track-type tractors, and more.