Part number AFF9620SA1 refers to an AeroForce 1-Spring Electric Front-to-Back Tarp System for Dump Trailers. This is a complete tarping system designed for trailers that are 96 inches wide and between 15 to 20 feet long. It utilizes a revolutionary internal compression spring technology, making it significantly stronger and more durable than many standard tarp springs. This system aims to minimize arm bounce, reducing wear and tear, and features an AeroMax motor with all-metal construction for robust performance.