This spring platform lift features a heavy-duty plated wire frame covered in gray flame retardant vinyl material. It is designed to raise and lower for easy loading and unloading and features covered springs that provide just the right amount of lift for each size. Additionally, this product is antimicrobial. It is designed to fit the 4618, 4618BL, 4618BLR, and 4618CUS/PTB R&B Wire poly trucks. Please note that the poly truck is not included.