... ’’*3/4’’19.1mm*19.1mm16,17,18,19,20,211’’*1/2’’25.4mm*12.7mm16,17,18,19,20,211-1/2’’*1-1/2’’38mm*38mm14, ... 15,16,17,18,191’’*2 ... ’’25.4mm*50.8mm14,15,162’’*2’’50.8mm ... BWG>In inchIn metric unit(mm) 1/2’’*1/2’’12.7mm*12.7mm16,17,18,19,20,213/4’’*3/4’’19mm* ...