High Efficiency Lube Spin-on Fits: Caterpillar Engines Replaces: Caterpillar 1R1808 Thread: 1 1/2-16 O.D.: 5 3/8 (136.5) Length: 12 3/32 (307.2) I. Gskt.: [1] Included Related to: B99 Series (Standard Versions)