Park Tool 打氣筒活塞墊片 PFP-2/4 #1075

My old pump was losing air fast, but this replacement gasket fit perfectly and brought it back to life. The rubber feels durable and seals tight with each stroke. Exactly what I needed for a quick fix.

Had to replace the old gasket on my floor pump after years of use, and this one slid right in with no hassle. Air pressure holds steady now, no more leaking at the plunger. Exactly what I needed to get my pump working like new again.

Fits my old PFP-2 floor pump perfectly and stopped the air from leaking back out. The rubber feels a tiny bit stiffer than the original, but it still seals tightly when I press down hard.