... STANDARD ASTM B88 SEAMLESS COPPER WATER TUBE TYPE M, Type K, Type L Straight Copper tube:AMERICAN STANDARD ASTM B88 SEAMLESS COPPER WATER TUBESTANDARD ... LENGTHSThe standard lengths for drawn temper ASTM B 88 tube ... , 5/8 and 3/4 diameters, and Type Kand Type L wall thinkness.TYPE M:Size:3/8",1/2",3/4", ...