... ,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 ... ,17,18,19,20,211" x 1/2 ... "25.4mm x 12.7mm16,17,18,19 ... .7mm x 12.7mm16,17,18,19,20,213/4" x 3/4"19mm x 19mm16,17,18,19,20,211" x 1"25 ... .4mm x 25.4mm15,16,17,18,19 ...