connector

Hi I am fitting a new basin and the tap distance is too much for the existing connections. I have not seen this sort of connector before, can anyone suggest how I disconnect the existing pipe? Alternatively is there a very short extension I can put into this somehow? The other end of this...

Hi everyone. I’m hoping someone can help me identify what the following connector is called. It goes to a bath sink and connects from the widespread handle stem to the center faucet stem. This connector connects to the handle stem. Hoping to find a replacement.