Meiser Accu Gauges, they employ a precision-made, friction-free, full-geared brass movement. The bourdon tube movement is exceptionally accurate and is not affected by changes in temperature, humidity or altitude. Every Accugage (not just random samples) are tested before it leaves the factory to ensure the best possible quality. GH Meiser & Co are so confident of the Accugage’s quality that they give a two year written warranty against defects in material and workmanship. Part no:Description:TGP50 Pencil pressure range 10 to 75 psiTG15XGA Round metal gauage, presssure range 0 to 15psi angle metal valve connection.TG60XGARound metal gauage, presssure range  0 to 60psi angle metal valve connection.TGH15XALow Pressure gauage with 280mm flexible hose, metal body with bleed valve, angled metal valve connection.TGH60XARound metal gauage, presssure range  0 to 60psi with 280mm flexible hose, metal body work, angled metal valve connection.TGRA60XLow Pressure gauage 0 to 15psi with 280mm flexible hose, metal body with bleed valve, angled metal valve connection.TGRGGMeiser gauge rubber cover