100-LB503-A-B Features: -Acetylene use only where cover must resist abrasion, weather and ozone.-Multi-ventilated pores in hose cover add safety to welding operations which permits dispersion of permeating gases.-For use with all fuel gases where a flame and oil resistant cover is required.-Operating Temp.: -40 F [Min], 212 F [Max].-Material: Synthetic Rubber. Color/Finish: -Color: Red/Green.