PC 1900 - Geo Dome Small The Geo Dome Structural Links shall be made of 1.029" O.D. 15 gauge galvanized mechanical tubing. The 6-way, 5-way and Footing Connectors shall be precision cut 12 gauge H.R.P.O. The 6-way, 5-way and Footing Connectors will be Powder Coated as specified. 1237 - Vertical Rock Climber The Vertical Rock Climber shall be made from high density 3/4" sheet plastic specially formulated for optimum UV-Stability and color retention. The Mounting Lug shall be precision die-cast from a high strength aluminum alloy and will be Powder Coated as specified.