Posted August 23, 2022Updated August 23, 2022Ideal for refillingUsed on Harbor Freight Air/Hydraulic Pistons. The sides need to be sanded and the sides lightly smoothed to make it work smoothly. PLEASE BE CAREFUL; Picture shows 4, you only get 2 - read the fine print.ProsTotal Weight: 357gConsCrumpled Packaging 0 0 0