Showtime Fabrication is pleased to offer this direct pin-on hydraulic thumb to fit a CAT 320 excavator (also CAT 318, 322, and most 325 models) with 80mm main pin. This specific thumb is 59" long x 25" wide and features two 1.25" thick AR400 steel tines and a USA made 5"x36" 4000psi welded hydraulic cylinder with an induction hardened, chrome plated 2.75" rod, and 2.75" pin-ends. Please ask.