There's a kind of elegance to the fact that you've made these so that the two-, three-, four-, five-, and six-pin jumpers each just add one additional color wire from the previous. But the red and orange are very similar in color, and so for the two-pin jumper wire particularly, it would be nice to have greater contrast between the two wires – perhaps red and black, or red and white, or red and yellow.

Does anyone know what actual connector is used on the ends of these?

I'd like to get some cables terminated like this in longer lengths and it doesn't make sense to spend $1.50 per cable then splice more wire in.

Hello,

Out of curiosity, is there a RoHS compliant version of this cable available?