Must say these are superb value for money ! Very, very well built - On my FF03, they perform really well, better than the stock Tamiya plastic units certainly. Getting 4 sets of short springs, different ball units etc for the total price is definitely a bonus. A word of advice - be careful when screwing on the ball end as the coated (gold) shaft can easily be damaged by the pliers. As the FF03 uses 55 mm shocks, I had to use longer ball end connectors. Overall - highly recommended.