Set of six wires, one each of 21 and 22 swg, of brass, copper & steel. 6 m each

Two metal frames are connected by a pivoted link which also carries a spirit level. A micrometer head reading to 0.01 mm is provided to re-adjust the spirit level. With two self-centering wire pin chucks, a ceiling bracket also with two pin chucks, a counterpoise weight & supply of suitable wires but without slotted masses.