The Springfield Mainstay Heavy Duty is an adjustable foot for boat or helm chairs, made of anodized aluminum with a diameter of 229mm and a tube diameter of 72.5mm. The height is adjustable from 381mm to 508mm by means of a gas cylinder. This pedestal rotates 360° and has a 1-hole locking mechanism, as well as side handles for height and sled adjustment. It meets the ABYC H-31 standard for Class AD or AP, ensuring safe and stable seating under harsh marine conditions.