Coolant Expansion tank. This lightweight aluminum expansion fill tank has a 1/2" N. P. T. bottom fitting and a 3/8" N. P. T. side fitting. 1-1/4 quart, has built in mounting brackets, accepts standard radiator caps. Recommended for applications where the top of the radiator is lower than the top of the engine. Mounting the tank higher than the engine insures a complete fill and provides an air space for expansion. Dimensions: 5-1/2" H x 4-1/2" W x 3" DPit Stop USA offers Canton Coolant Expansion, Fill Tank 80-200 at low everyday prices. Be sure to check out all of our products from Canton Racing Products including Canton Racing Products Overflow and Expansion Tanks.