It just looking great shocks, but not so good quality. Instructions manual is useless, I just had to build it with my experience. I spent long hours to adjusting the shock oil. You to have to fill up just right amount of shock oil to make them work smooth. That was the most difficult part of this shock dampers build. This is just substitution for Tamiya Options shocks. Tamiya options parts are so expensive, but their quality are one of the best in the markets.
These shocks are good for the Price, The are better then the Tamiya plastic shocks but not has good has the upgraded Tamiya shocks . The plastic ones are $25 these are $40-50 and Tamiya upgrades are $70-80. I did use the Tamiya shock fluid for these shocks it’s the yellow kit oil , think is 400cst that worked way better then the fluid that comes with them. The fluid that’s with the shock is not so good.