1 5/8 in, Nominal Outside Dia.
2 in, Cross Section Shape Rectangular, Durometer 55 Shore D, Durometer (Hardness) Rating Very Hard, Color Black, Temp.. Backup Ring,Hytrel,326,PK25 Backup Ring, Material Hytrel, For Use with AS568A Dash No.Range -65 Degrees to 275 Degrees F, Package Quantity 25 326, Thickness 0.