Fits: Standard-size radiator filler necks, including Moroso Nos. 63420, 63465, 63466, 63467, 63485, 63486, 63650, 63651, 63656, 63730, 63740, and 63745
Available with low and high pressure raitings to accommodate the needs of all cooling systems
Steel spring maintains accurate pressure setting over time
Six-sided Cap for easy tightening
