... 6.4mmx 6.4mm22,23,243/8" x 3/8"10.6mmx 10.6mm19,20,21,221/2" x 1/2"12. ... 7mmx 12.7mm16,17,18,19,20,21,22,235/8" x 5/ ... 8"16mmx 16mm18,19,20,21 ... ,3/4" x 3/4"19. ... 1mmx 19.1mm16,17,18,19,20,211" x 1/2" ... 12.7mm16,17,18,19,20,211-1/2" x 1-1/2"38mmx 38mm14,15,16,17,18 ...