VSR Pro 52™ NEO Traction Magnets are some of the strongest NEO Traction magnets available at an affordable price. Pro 52™ traction magnets provide maximum down force which allows faster cornering and better handling. VSR recommends using a minimum of a 34 gauge armature, Super Stiff chassis and aftermarket track power supply for best results. Gauss readings are 4200 at the rail. These are designed to fit the Viper V1, BSRT G car and SG+ chassis with included spacers.