Sorry for the delayed response but yeah I've always used Exel or Terumo. They're great pins and very reasonably priced.. Only problem I had once was with a Terumo pin when I was mixing hcg and went to put the pin in to the vial and the needle fell off because it wasn't screwed in tight. My mistake for not checking it before but it was a pin that came with the needle attached already so I didn't think to. Other than that the pins are smooth, solid and sterile.