Mine was 15 tennis-balls, looked nothing like the parts catalog Where can I find those peksy rubbers? All I can find are stores out of the actuators >_<. I siliconed the one for my trunk and it seems good now, the others dont seem to leak (or at least not much) but I have yet to check the front pass door. It's the only one that doesnt lock when I suck on the line (sorry, no vac pump here >_<). But NONE unlock... and they dont leak.