To make it easier for you to turn our SeaSucker into your solution, we've slotted holes in the top (for bolting whatever it is you’re mounting on there) plus a threaded (1/4-20) stainless insert. The 4.5” SeaSucker vacuum mount is rated to pull up to 120 pounds. All metal parts are high-grade stainless steel, even the springs inside our pump, for extra durability in the elements. Protective cap included. Available in Black or White.