Ives 112HD 83IN US28 Continuous Hinge Standard pin material are: Brass Hinge Steel Pin, Stainless Steel Hinge Stainless Steel Pin, Steel Hinge Steel Pin Aluminum Continuous Gear Hinge, Full Mortise, Narrow Frame Leaf, Narrow Door Leaf, No Inset, 83", Aluminum Aluminum Continuous Gear Hinge, Full Mortise, Narrow Frame Leaf, Narrow Door Leaf, No Inset, 83", Aluminum, Non-Handed.