Crappy pic of course, typical cl ad!
That is (I believe) a roller bearing element. Most likely used in either a rear axle hub on some medium or hd truck axle or possibly in a large truck tranny or even pto unit.
Typical packaging by ihc of service part bearings was in a hard-shell "canister" that was sealed to exclude atmospheric air, they had either a pull-off tape seal or in some cases you actually used a can opener! Some of those bearings used in the big truck stuff are huge, you've prolly seen 'em in that military equipment apps!