Made of high quality material for long durability and usage. The perfect workmanship give you an excellent usage experience. The pressure cooker jigger valve is an indispensable accessory for the normal and safe operation of the pressure cooker. This pressure cooker pressure relief valve set fits the lids of almost all pressure cookers universally The pressure cooker pressure relief valve set is easy to use and small and light.(For different batches, the color of the rubber ring of the exhaust rod may be other colors, which not affect the use)