Expansion Joint, Bolt Circle Diameter 17 in, Bolt Hole Size 1 in, Bolt Hole Threading Unthreaded, Burst Pressure 853 psi, Compression Distance 3/4 in, Connection Type Flanged, Expansion Distance 1/2 in, Expansion Joint Type Single Bulb, Features Absorbs Water Pulsation and Minimizes Water Hammering, Applicable for Suction and Delivery (Discharge), Floating Flanges, Prevents Piping System and Equipment Breakdown, Provides Sound and Vibration Isolation, Flange Diameter 19 in, Flange Material Steel