Fabricated from corrosion and chemical resistant glass reinforced polypropylene and PTFE filled polyethermide, this lightweight support is non-magnetic and non-conducting. Poly-Jaque utilizes the scissor jack principle for quick, easy and accurate height adjustment. PTFE nuts provide smooth, non-freezing operation. Platform measures: 6-1/2" x 6-1/4". Height adjustment from 3-1/2" to 12". Weight capacity, 15 lbs.