... 4mm x 6.4mm22,23,243/8" x 3/8"10.6mm x 10.6mm19,20,21,221/2" x 1 ... /2"12.7mm x 12.7mm16,17,18,19,20,21,22,235/8 ... " x 5/8 ... "16mm x 16mm18,19,20,21,3/4" ... x 3/4"19.1mm x 19.1mm16,17,18,19,20 ... 25.4mm x 12.7mm16,17,18,19,20,211-1/2" x 1-1/2" ...