ALEKO 4MGRACK33 Steel Gear Racks for Sliding Gate Opener Operator Set of 4 3.3 Foot Racks Total 13 Feet Our steel gear racks are compatible with any ALEKO brand AR series rack driven gate openers Made for ALEKO brand gate openers, but compatible with most other rack driven openers Made of durable stainless steel Steel gear racks last longer than nylon racks Includes (4) 3.3 foot long gear racks for a total of 13 feet, and all needed fixings