Used lightly in my RR10 bomber, and then a pair was used on my E-Firestorm for a short while. No leaks, excellent condition.
The 2 that were on my E-Firestorm have traxxas rod ends instead of the stock proline ones, doesn't affect performance at all.
They come with all spring rates, and the extra pistons.
These are the best shocks I've ever used on a Bomber or SC truck, super smooth, easy to dial in and rebuild, and leak free.
£60 posted for all 4