Backup O-Ring, Material Buna-N, For Use with AS568A Dash No. 443, Thickness 0.117 in, Radius 0.344 in, Axial Thickness 0.096 in, Actual Width 0.236 in, Actual Inside Dia. 7.524 in, Cross Section Shape Rectangular, Durometer 90A, Durometer (Hardness) Rating Hard, Color Black, Temp. Range -40 Degrees to 250 Degrees F, Package Quantity 10