An extra measure of protection with a choice of two metals: Aluminum and Galvanized Steel. Galvanized steel, available in three non-porous metal thicknesses – 7 gauge, 10 gauge and 12 gauge – doubles the life of the vaults. You find this type of more durable galvanizing in guardrails, highway sign frames and posts, and light posts. The natural properties of premium quality aluminum protects caskets from the elements for generations. Available in 1/8 inch thickness, series 5052 aluminum is commonly used in boat hulls, hydraulic tubing and appliances.