PASSIONHOSE vacuum silicone hoses are made of high-grade silicone material, which are highly flexible, without bad smell, and have high-temperature resistance. 1/8" 5/32" 3/16" 1/4" 5/16" 3/8" High Performance Automotive Silicone Vacuum Tubing Hose,Industrial-grade silicone hoses are good to be used to transfer air, water, and antifreeze. Food-grade silicone hoses are FDA, LFGB, ROHS, REACH, and Prop 65 certified, which are excellent to transfer drinking water, milk, beer, coffee, etc. Hose sizes are controlled by machines precisely. The size tolerance is only +/-0.3mm. Length could be 50m or 100m per roll, 100ft or 10ft per roll.