This Coolant Expansion Fill Tank is 1.25 Quart. Size: 5-3/4" Tall, 4-5/8" Wide, 3-1/8" Deep. Side Port: 3/8" N.P.T. Bottom Port: 1/2" N.P.T. This Canton expansion tank is built with .100" thick aluminum and has a billet aluminum neck with a barbed overflow fitting and accepts standard radiator caps.