New Fox float performance elite 210 x 55 shock. I purchased this a few weeks ago from bike-discounte. A German retailer of bike parts. I ended up not using it and did not want to pay the return shipping to Germany to get a refund. You can look up the specific tune of the shock with the serial number pictured. It looks like it is a medium compression and medium rebound tune which should be good for most bikes. These newer float shocks can have the stroke changed easily so if you need a 52.5 or 50 it just involves a couple plastic spacers that cost a few dollars.