OTTO Excavator Parts Tfr55 4Jb1 Thermostat Hose 8970388090 897038-8090 8-97038809-0 For Isuzu This product is a thermostat hose designed for the TFR55 4JB1 model, used in Isuzu engines for OTTO excavator parts. It assists in regulating the engine's operating temperature efficiently.