Expansion Joint, Bolt Circle Diameter 8 1/2 in, Bolt Hole Size 3/4 In.-10, 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 10 in, Flange Material Steel, Flange Material Finish Zinc-Plated, For Fluid Type Air, Gas, Hydraulic Fluid, Water, Joint Material Neoprene, Joint Material Finish Not Applicable