Leveling Mount, PolyMount Type, Thread Size 5/8-11, Base Dia 5 In, Load Capacity 7500 Lb, Height 6 5/8 In, Bolt Length 4 In, Construction Steel, Finish Clear Zinc, Includes Jam Nut Poly Leveling MountsPolyglass-fill nylon base is corrosion-resistant, making it ideal for washdown applications. Lag holes allow permanent floor mounting.