Alloy model [single Cold DC] two-piece set/set,

Alloy model [single Cold DC] four-piece set/set,

Alloy model [single cold communication] four-piece set/set,

Alloy model [single cold AC/DC] four-piece set/set,

Alloy model [hot and cold DC] Six-pieces packing/set,

Alloy model [hot and cold communication] Six-pieces packing/set,

Alloy model [hot and cold AC/DC] Six-pieces packing/set,

-------- The following is all copper--------,

All copper [single Cold DC] two-piece set/set,

All copper [single Cold DC] four-piece set/set,

All copper [single cold communication] four-piece set/set,

All copper [single cold AC/DC] four-piece set/set,

All copper [hot and cold DC] Six-pieces packing/set,

All copper [hot and cold communication] Six-pieces packing/set,

Copper [cold/hot/AC/DC] Six-pieces packing/set