1985 Mack RS686LST, Truck Tractor, Coolant Reservoir, Fits to: Mack RS686LST, (Used) 1985 Mack RS686LST, COOLANT RESERVOIR/ RADIATOR OVERFLOW BOTTLE- Location: On Radiator, Material: Steel, Dimensions: L=27.5", W=10", For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921 - Dimensions: L=27.5", W=10" - Fill Location: On Radiator, Truck Year 1985, VIN 1M2T153Y4FM002646, Part Make Mack 1M2T153Y4FM002646