This is a very good quality tailpiece. It is 10,6 cm long with a high quality craftmanship.
This is also one of the smaller tailpieces available for 4/4 violin which also allows a lower pitch for the string length bridge-tailpiece. Personally, I prefer not to tune this part with open strings as some harmonics can sound harsh in some violins. The final result also depends a lot on your instrument.
While this dimension tends to work good with different violins, it really can make the difference on some violins, generally lighter ones.
The nylon tailgut that's included works quite good. In case, you can experiment with a kevlar one to see if the sound of your instrument can benefit from it although this operation is not for everyone.