Expansion Joint, Bolt Circle Diameter 14 1/4 in, Bolt Hole Size 1 in, Bolt Hole Threading Unthreaded, Burst Pressure 600 psi, Compression Distance 1 3/4 in, Connection Type Flanged, Expansion Distance 3/4 in, Expansion Joint Type Single Bulb, Features Metal Collar Cast into Retaining Ring, Molded Integral Flange, Flange Diameter 16 in, Flange Material Steel, Flange Material Finish Not Applicable, Flange Material Grade Not Applicable, For Fluid Type Not Applicable, Joint Material EPDM