This brushed aluminum, threaded pedestal with stainless steel base features a drop-in spring-loaded swivel mount and a 7"sq. base. 3/4" pin pedestal design uses patented LockN Pin technology for safety and versatility. Drop-in components easily slide together, then lock” into place to prevent unintentional detachment. Meets ABYC H31 type B seat standards for boat speeds under 5mph.11"H x 1 1/2"dia. Orders include one pedestal only.