If they are perfectly cut like Roger's racquet maybe 2-4 grams at the max but provide great dampening. I used it on my K90 & RF97. As specially RF97 is stiff racquet with full poly. I feel pretty good with power pad on it otherwise poly + racquet stiffness won't allow me to use full poly at all (even at 50lb). I won't play with RF97 without power pad unless you put multi or synthetic, which I hate.