Copper Tubing Temper: Soft Material: Copper Pipe Tubing Size: 3/8 in Length: 100 ft Application: Residential Material Type: Type L Wall Thickness: 0.035 in Outside Diameter: 1/2 in Origin: Domestic ASTM Specifications: ASTM B-280, ASTM B-306, ASTM B-88 FM Approved: No NSF Certified: Yes NSF Specifications: NSF 61 Annex G