Simpson Racing Diamondback 2015 7 1/2 Blue 6297125 Diamondback. Manufactured in the USA. Snell SA 2015 Rated. Defined "Wave Eliminators" increase functionality from an aerodynamics aspect. Recessed eye port offers a 100% shield seal. Frontal Head Restraint Ready. Radio communications available. Side pipe air option available. Recommended for: Multi-use helmet. Circle track, dirt track, Drag, Karting, Off Road and Road Racing. Sizes 7-1/8 - 7-3/4.Replacement Shields: SIM1020-12: Clear