As the plunger is pushed forward the cavities force the O'RING out to form a hard seal against the outer wall.
As the plunger pulls back the O'RING is forced to contract hence the return will be fast and un restricted.
She is fast and smooth in operation and you will get increased rpm out of your motor and stress it less.
We have done all the hard work and spent a lot of money in research for you and these parts that I am now selling are the best and will be the right type of upgrade that will give you the best benefits.
YOU ARE BUYING:
# Beast Pro O'ring Plunger