This neck fits these markers: Ion, Ephiphany, Impulse, Shocker SFT, Invert Mini, Spyder VS1, VS2, VS3, RS, RSX, Angel 1We"ve taken the perfect amount of metal out of the feedneck to give you a neck that is STRONG and LIGHTWEIGHT. This feedneck will not break and to prove it, we"ve backed it with the CP Lifetime Warranty. Designed to handle the toughest playing conditions.