Yup these are definitely smaller nipples. I contacted the seller they already offered to refund/return. I asked if they had larger nipple to send out and I send back the small ones. They just responded to that they did not and reaffirmed that they would accept the return. 

Earlier today I sent an email through the Buchanan Spoke website asking if they had the specs for my MX250, maybe I get a response soon. I need to measure the diameter of the heads of the nipples to compare with what they offer. Too bad they do not have brass plated ones, that is what mine originally were, or so it appears.