Expansion Joint, Bolt Circle Diameter 7 1/2 in, Bolt Hole Size 5/8 In.-11, Bolt Hole Threading Threaded, Burst Pressure 853 psi, Compression Distance 2 in, Connection Type Flanged, Expansion Distance 1 3/8 in, Expansion Joint Type Double Bulb, Features Absorbs Pipe Movement and Stress, Flange Diameter 9 in, Flange Material Steel, Flange Material Finish Zinc-Plated, For Fluid Type Air, Water, Joint Material EPDM, Joint Material Finish Not Applicable, Joint Material Grade Not Applicable