Two belts present far more visual coverage than one, and the FY fluorescent yellow belt color against the Yellow (YL) housing keeps the closure conspicuous where people and equipment are moving — a machine bay, a maintenance zone, the approach to a loading edge. Each belt spans up to 18 feet, with a choice of Standard or S-Hook belt ends to suit what the belts fasten to on the far side. Its job is to block and mark off access; it is not impact-rated, load-bearing, or forklift-stopping, so specify a rated guardrail where impact protection is needed. SKU 50-3015DL/YL/18/FY/BE.