Gold-plated break-before-make contact Two up/down buttons Decade, BCD and Hexadecimal Modules may be separated by spacers and assembled between cheeks H 24mm, W 7.62mm, D 32mm Cheeks and spacers available separately Cut out, 22.5 by [(no. of switches x 7.62) x (no. of spacers x 2.54) + 3.5] mm