invar strip/foil available Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube INVARUsage: Grade 4J32 and 4J36 are suitable for environmental temperature, make dimensional precision parts for instrumentation. 4J38 are used for easy to cut alloys. 4J40 are used for parts that require low expansion at high temperatures.Specification: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/TubeA Nickel-Iron, ...