Bought bigger jets but the hole is smaller?

[gorbys]

On the right is the one that was in my carb, marked 47.5. On the left is the new one which is a 50. But the bottom hole is clearly bigger on the old one? 

Other differences are New ones have 8 small holes on the body vs 6 on the old one. 

Is this right or have I gotten the wrong jets? 

[gorbys]

Okay. Googled. Seems I have gotten mikuni VM jets and not BS jets. Cases closed.