This was a copper boiler kit I purchased from Blackgates Engineering in the UK for an LBSC 3.5"-gauge Virgina 4-4-0 locomotive. This was for the large boiler version of the locomotive. It may be able to be adapted to other 3/4" scale locomotives. The boiler barrel is 4.5" in diameter. Comes with the flanged boiler plates and most all of the material to fabricate the boiler. Price is $1250 + $25 for shipping. Will ship in the US only or pickup at my shop is welcome also. Located in Wisconsin.