Stanley National N100-875 Stay Roller Zinc Designed For Use As A Guide On Large, Sliding Doors Up To 2-1/4" Thick By Side Mounting To Building. Embossed Frame With Two Wings Provides Greater Bracing And Holding Strength Versus Conventional Single-Support, Corner-Iron Frame. Delrin Wheel Ensures Rust-Free Operation And Is Formed To Prevent Dirt From Clogging Or Accumulating. STAY ROLLER ZINC. Features Designed For Use As A Guide On Large, Sliding Doors Up To 2-1/4" Thick By Side Mounting To Building Embossed Frame With Two Wings Provides Greater Bracing And Holding Strength Versus Conventional Single-Support, Corner-Iron Frame Delrin Wheel Ensures Rust-Free Operation And Is Formed To Prevent Dirt From Clogging Or Accumulating Convex roller wheel prevents gouging of door, Roller is adjustable USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.