This is for a joblot of plastic 4mm scale single mounting hole tension lock couplings. They do look to be unused.
Joblot of Plastic 4mm Scale Screw Fit Tension Lock Couplings #7
Joblot of Plastic 4mm Scale Screw Fit Tension Lock Couplings Look Unused #5
Joblot of Sharman 4mm Scale Plain Ended Axles #2
Pair of Plastic 4mm Scale Screw Fit Tension Lock Couplings Factory Sealed #2
Small Joblot of 10 x Steel Ballast plates for 4mm scale plastic wagon kits.
Small Joblot of 4mm Scale Station / Signal Box Lettering Plastic For Spares Only