The Probe from Sure Grip are made of Strong yet lightweight Nylon with 10 degree double action trucks. Probe Plate for Roller Skate from Sure GripThe Probe Plate is made of Super tough nylon A 10 degree double action truckUrethane cushionsReplaceable toe-stop insert(toe stop not included)7mm or 8mm axles Made in the USAOnly few color left email us before order*The probe will keep being produced in Black and Orange onlyPS: do not include Toe stop and Mounting hardware Features Probe plate:The Probe from Sure Grip are made of Strong yet lightweight Nylon with 10 degree double action trucks.The Probe Plate was designed with the Century NTS in mind as well as the original probe but a more cost effective approach.The Probe plate is available in 7 or 8mm axlesand the choice of colors. Technical Specifications Plate, aluminumTrucks, cast aluminumHanger, integrated into plateAxles, 7mm or 8mm steel onlyCushions, standard urethane or 4 types of super urethaneKingpin, steelJump brace N/A, Toe stop N/A