Mitutoyo Digimatic Cable Extension Adapter When a Standard Mitutoyo SPC Cable of either 3' or 6' just isn't long enough, this Digimatic Cable Extension Adapter allows you to add another 6' of length to your SPC Cable. Plug the 10-pin connector end of a standard Mitutoyo SPC Cable into this adapter, and then also plug in a Mitutoyo SPC Cable # 965014 (not included) to add 6 additional feet to your original SPC Cable.