SRC Never-Rust Semi-Permanent Warning Line System. This version of the Never-Rust warning line eliminates the orange stanchion and replaces it with an aluminum stanchion that is capable of supporting 100'™ of stainless cable and pennants. This durable system with stand up to the harshest elements while maintaining it'™s Never-Rust reputation. 30 lb recycled rubber base and aluminum construction will eliminate rust stains on roofs that metal systems can produce.