Try Tru Ball spider silencers with the speed balls. I use these and they never wear out can be switch from one bow to another and can add alot of speed to your set up. By experimenting with moving them up and down my string I've added 11 fps went from 264 to 275 at 61# draw with a 360gr. arrow and it's dead quiet.Check them out you will not be dissapointed.