The GPX series is an upgrade to the existing CX rail rod blanks, they feature the same woven carbon fiber as the GP series. The extra layer stiffens up each blank giving you an extra line class, and unlike the GP's this difference is extremely noticeable.

Model	Length	Action	Rating	Pc	Tip	Butt	Weight
GPX 70 Raptor	70	Fast	50-100	1	9.5	0.920	12.50
GPX 70 Centaur	70	Fast	60-130	1	10	0.930	13.50
GPX 70 Viper	70	Fast	80-150	1	11	0.928	13.50
GPX 70 Invictus	70	Fast	100-Unl.	1	12	1.011	17.50
GPX 70 Gladiator	70	Fast	Unlimited	1	13	1.040	20.00
GPX 76 Raptor	76	Fast	50-100	1	9	0.932	15.10
GPX 76 Centaur	76	Fast	60-130	1	9.5	0.955	15.70
GPX 76 Viper	76	Fast	80-150	1	10	0.982	17.30
GPX 76 Invictus	76	Fast	100-Unl.	1	11	1.062	20.80
GPX 76 Gladiator	76	Fast	Unlimited	1	12	1.082	23.70
GPX 80 Raptor	8'0"	Fast	60-130	1	10	0.962	17.00