Simply select your required colour/size of connector from the top list, this will
reveal all available connectors of that size in the middle list, then select your
Red are to fit wire sizes 0.05 - 1.5 sq.mm. / 22-18 AWG
Blue are to fit wire sizes 1.5 - 2.5 sq.mm. / 14-16 AWG
Yellow are to fit wire sizes 4.0 - 6.0 sq.mm. / 12-10 AWG