A pair of Bachman Tension Lock Couplings on a 3 hole bar.
Type 36-026 long
These couplings will fit the adaptor included in Cambrian Kits originally designed for Hornby Couplings although the holes may need slight enlargement. Ideally the Bachmann 36-025 (short) couplings should be used but as these are in very short supply this 36-026 (long) can be used with the adaptor set back from the headstock by an extra couple of mm.
This pack contains enough for 1 wagon. They are also available as a pack of 10 see B36-026-10