This is for a joblot of 4mm scale plain ended axles. I am afraid that I do not know the manufacturer.
Joblot of Plastic 4mm Scale Screw Fit Tension Lock Couplings #7
Joblot of Plastic 4mm Scale Screw Fit Tension Lock Couplings Look Unused #5
Small Joblot of 8 x 4mm Scale Large Whitemetal Ventilators Unused #10
Joblot of 6 x 4mm scale Sprues No Idea what they are Poss Railings Unused
Joblot of 83 x 4mm Scale Single Railchairs. Look Unused