All of UA's 767-300s are ERs. There are 2 configurations, international and domestic.

The 3-class international seats are quite good (although F isn't as good as the FirstSuite on 777s and 747s), with C+, E+ and PTVs in every seat. F is 2-1-2, C is 2-2-2 and Y is 2-3-2.

The 2-class domestic seats are rather poor in F. They are the same seats you'd get on a 737 or 757 (2-2-2 config.) with pretty meager pitch and recline. There are no footrests nor PTVs. There is E+ in the same 2-3-2 config, but not PTVs.