MetMo Dual Fidget Piston Stand

The stand is quite cool but includes two very tiny gaskets to maintain the pressure gradients. You manually insert them into an open seal (where you screw the pistons) and the fit does not not keep them well. Despite my diligence, one gasket already disappeared and I don't know how long I can anticipate the other staying. They can be purchased -- elsewhere -- I was able to find someone to sell me 250 of them, and including shipping, a $25 additional cost to maintain this otherwise very cool item