Check the listing for details. Chain Link Single Trolley Assembly for Overhead Slide Gate I-Beam. Condition: New. Listed at 59.00 USD. All Products | DF Supply, Inc. Product Information " alt=""> Click on the Image to Enlarge zoom_in " alt=""> Chain Link Single Trolley Assembly for Overhead Slide Gate I-Beam Model: TRS Key Features: Designed to fit 5" to 6" I-Beam Will fit a 1 5/8" to 2" pipe Made from heavy-duty and durable pressed steel that has been galvanized Chain Link Single Trolley Assembly for Overhead Slide Gate I-Beam Product Details Product Details The Galvanized Single Trolley Assembly for I-Beam is an overhead slide gate assembly forged from galvanized pressed steel and equipped with two rollers and sealed bearing wheels for smooth, seamless operation. It fits 5"- 6" I-Beams and pipe sizes from 1 5/8" - 2" in diameter. Once installed, it helps facilitate consistent performance for your slide gate system.