Duda Diesel pexo12 320' Roll of 1/2" PEX-AL-PEX Tubing Grade A Oxygen Barrier Radiant Floor Water Glycol Heating Loops Length: 100 meters = 320 feet, ID: 12mm, OD: 16mm, pex thickness: 1.7mm, al thickness: 0.21mm, overall thickness: 2mm Grade a (highest quality) pex-al-pex, oxygen barrier essential for radiant floors Working Temp: -40&deg;C to 95&deg;C, working pressure: 2.5 mpa (362 psi), max bursting pressure: 5.0 mpa (724 psi) Service life expectancy: 50 years, safe for use with potable water, Iso9001, Astmf1281 Excellent for use in domestic water Supply, glycol loops, floor heating/furnaces