1003330 Selection of new caspules to repair aneroid barometers, not simple but we have done many over the decades. capsules are mostly evacated from the base thread so must NOT be cut! comes with thin nut on base thread top spigot needs drilling to suit barometer neing repaired. They tend to work more than old ones, best to select a size a little smaller often. Most grey painted some Nickle coated (Nic)Hieght is before beimg pulled apart by the spring. Double capsules also used on some barographs
