... /8’’10.6mm*10.6mm19,20,21,221/2’’*1/2’’12.7mm*12.7mm16,17,18,19,20, ... ,18,19,20,211-1/2’’*1-1/2’’38mm*38mm14,15,16,17,18,191’’*2’’25.4mm*50.8mm14,15 ... ,162’’*2’’50.8mm*50.8mm12,13,14,15,16 Technical ... DiameterIn inchIn metric unit(mm) 1/2’’*1/2’’12.7mm*12.7mm16,17,18,19,20,213 ... ,18,19,20,211’’*1’’25.4mm*25.4mm15,16,17,18,19,20Technical Note:1.Standard roll length ...