NX-1/22 for Mezz Hard Maple, WX700, and HP2 shafts NX-4/10 for Mezz WX900, HA3C, and WXC shafts NX-5/15T for Mezz WX Alpha shaft NX-2/15 for Exceed EXPro shaft & Alpha Hybrid The high performance "NX" ferrule is specially formulated with two different materials. It has a certain amount of modulus of elasticity, yet has resistance to the friction of heat enhancing accuracy and power to the cue ball.