I agree with you Pat. I've never bought an injector that came with "spare" orifices. Al do you recall where you bought them and what type?If they were "spares" it sounds like they came with the "super suds sucker" that send you diff orifice sizes for different gpm pumps. SSS only injector I bought that came with several orifices. So they aren't really spares. They should have size stamped on them like 2 or 2.1 or 2.2.