This 1/2" (12mm) bore syphon tube is made from 5/8" (15mm) outside diameter x 1/16" (1.6mm) wall thickness food-grade PVC and is sold by the metre to enable you to make your syphon the optimum length for your needs. Just select the quantity in whole metres required and we will cut it to length specially for you. 30m maximum length. This is the size of tubing which will fit on to our white quickserve taps.