bourdon tube type pressure gauge diameter 23,25,27,30,37 8*1,M10*1,G1/8,NPT1/8" product feature: 1. Stainless steel shell ,brass thread connection. 2. Completely shockproof and waterproof. 3. The window is made from unbreakable polycarbonate plastic. 4. The indicating data is accurate and distinct for reading
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