Diamond shaped reservoir cover base.

• Powder-coated marine-grade aluminum is die-cast with an over-molded rubber ball
• Each kit includes black oxide SM420 screws (M4 x 20mm hex drive stainless steel machine screw), black oxide SM430 screws (M4 x 30mm hex drive stainless steel machine screw) and black oxide SM435 screws (M4 x 35mm hex stainless steel machine screw).
• Easy installation
• Fits cleanly over your existing reservoir cover with the 1" ball centered