stainless steel, rather a mystery item. looks to be an expensive item from the construction and level of quality present. 14-1/4" long, info on the unit: b/n g3792 1qtd9 assembly p/n: 6980455e2 s/n: m2488. the tip says: m2711 1qtd9 6994692. shaft is hollow and connects to the 4 nozzle ports on the taper sides of the point. if you know what this is used for we'd love to hear from you! were very curious about what this is!