The 11 Series Operators have a high-pressure die-cast zinc housing that is electrostatically coated. The E-Gard coated gear arms and drive worm are made of hardened steel. The #11.16 Awning Roto Gear Shoe Stud Operators (24-3/4") are designed to work with an extruded guide bar and the 13 Series Awning Hinges. We sometime find number 45301 on the housing. Order awning slide shoe (10005) track (30568.92) and handle separately if needed (see related products below).