Suitable for the heavy duty service where pressure impulse, shock and vibration are encountered.
With well reisist vibration and vibration-proof  function. 
Diameter : 1.5" (40 mm), 2" (50 mm), 2.5" (60 mm), 3" (75 mm), 4" (100 mm), 6" (150 mm).  
Material : Stainlesss steel case,      brass connection.