... ,17,18,19,20,21,22,23 5/8" x 5/8" 16mm x 16mm 18,19,20,21, 3/4" x 3/4" 19.1mm ... x 19.1mm 16,17,18,19,20,21 1" x ... 8" x 3/8"10.6 x 10.619,20,21,221/2" x 1/2"12.7 x 12.716,17,18,19,20,21,22,235/8" x ... 5/8"16 x 1618, ... 19,20,21,3/4" x 3/4"19.1 x 19.116,17 ...