Tuning your Losi Mini-B or Mini-T 2.0 RC car? These upgraded shock spring retainer cups are designed to improve your suspension setup. You get 4 cups (one for each shock). They're extended compared to stock, which can give you more spring preload adjustment or prevent spring binding. Made in the USA. Brand is Losi (or compatible with Losi). Type is just listed as 'losi' - it's a specific upgrade part. Compatible fuel type is electric (these are for the electric Mini versions). Compatible scale is 1:16. Perfect for racers or bashers who want to fine-tune their shock performance. Installation is simple: remove the shock, swap the retainer cup, reassemble. Allows for different spring rates or ride height tweaks. Made from durable material. Great for competitive edge or just smoother jumps. A small part that can make a noticeable difference in handling. Essential for serious Mini-B/T enthusiasts. Upgrade your RC's suspension without breaking the bank. Get more control on the track. Works with the 2.0 versions. Order a set and experiment with setups. Take your mini RC to the next level. Enjoy better landings and cornering. A popular upgrade in the community. Try them out and feel the improvement.