1-1/2 qt. reservoir is approx. 5-1/2" L x 3" W x 6" H. Installs easily with adjustable brackets. Complete with all necessary tubing, spring clamps, hardware and instructions. For open (older) systems with radiator and overflow tube and closed (newer) systems with radiator and overflow tube connected to reservoir with snap-off cap. NOTE: Not for pressurized reservoir system.