Hewlett-Packard (HP) 21081A Extension Cable for 400-Series Disposable Temperature Probes -- 3 each.

Extension Cable (s) for Disposable Temperature Probe w/1/4-inch, 7mm Phone Jack Instrument Connector for Use with All Hewlett-Packard (HP) 400 Series Disposable Temperature Probes.  These are brand-new, sealed, cables that have never been used.

Ref. HP-2403012