... pressure range. 4.Glass or plastic 1.5"steel screw surface pressure gauge Specifications can be made per customer ... copper alloy. 2.Heating ,air-conditioning technology, pneumatics,air compressor, vacuum pump, pressure air regulating, testing equipment, medical sterilizer ... blackDesign for window:snap on plastic(for plastic case ), screw in polycarbonatesteel, steel black bezel(two screws )with glass ...