valve seals?
#3
TECH Regular
iTrader: (2)
they sell this tool http://www.jegs.com/i/JEGS/555/80596/10002/-1 or you can use a deep socket same size as the seal OD!! just press down on the seal and just tap it a little if you don't think is all the way down if you tap it too much or hard it will damage the seal