This is a pre-owned Synthes air hose. It's 3m long with an MA-7 fitting at the regulator supply end and the Synthes fitting suitable for the 511.701 Compact Air Drive II at the other.
We can also service these hoses if you have one that needs to be repaired? It will be usually be cheaper than buying a replacement. Go to our repairs page for details on how to send it in for a quote if required.