tender for external coupler [female] in set consisting of [1] coupler complete w/o key =3 nos. [2] key withscrew type-b = 2 nos. [3] key with screw type- c = 2 nos.[4] key with screw type - d = 2 nos. to clws spec.no. clw/es/c8 alt. h orlatest. (user for wag5, conventional locos.) .