Local part store offered 2 different ones. China made non grease zirt @ $23.00. USA made with zirt for $51.00.
I bought and will always buy USA made. OEM didn't come with zert Not sure if steelership offers serviceable one as replacement. they too brobibly buy China BOS ones.
Spicer are the best you can buy for the money. Non greasable ones have better seals and a slight strength advantage. The ones with the zerk fittings are easier to service and you can purge old grease or contamination out of them.