Pair of replacement gas bottles for an Ohlins twinshocks.
They are a replacement part and have been beautifully machined and anodised blue colour.
If you are rebuilding your shocks rather than have your manky, damaged, clipped and worn old ones repaired and re-anodised, fit a new pair! They screw on / off the piggy back castings.
Not a job for a home mechanic, if you don’t know what you are doing then get a professional suspension technician to do the job for you.
Don’t forget to buy some decals to add the finishing touch!