This is a black, nitrile o ring. It measures 1 ID x 1, 1/4 OD x 1/8 diameter.
It is 70 durometers with a tolerance of .003. It has an actual inner diameter
of 0.984", an actual outer diameter of 1.262", and a cross section size of
0.139". It is used for hydraulic applications. It weighs 0.27 lbs. It has a
nominal inner diameter of 1", and a nominal outer diameter of 1-1/4".