Scotty 165 1.5′ Ball System Top Plate SPRING_ENGINE_TUNE_UP_AND_FILTERS The ball joint design of The ball joint design of the Scotty 150 enables a smooth Manufacturer MPN Configuration Specifications 0528C0699A chrome plated bronze replacement cap with O ring 1" For Figure 0528 1" pipe size fill 0528C0999A chrome plated bronze replacement cap with O ring 2" For Figure 0528 2" pipe size fill 0528C1099A chrome plated bronze replacement cap with O ring 2 1 2" For Figure 0528 2 1 2" pipe size fill 0528C1199A chrome plated bronze replacement cap with O ring 3" For Figure 0528 3" pipe size fill Technical Information 2 1 4” square fixed base 5″ ball joints allow for 360 degrees of rotation and 180 degrees of tilt at both ends