Hawk HB102E.800 Racing Pad - Blue Compound Racing The larger 4mm hole is

The larger 4mm hole is used with Bell SRV-style shields

SFI-approved EIS (Energy Impact Systems) W50 foam is widely used throughout the motorsports industry where energy management is needed in impact zones

Based off the conveniently sized and popular Bell Hans Pro V

Featuring multi-adjustable straps for radio headsets and an adjustable visor system

Hawk HB102E.800 Racing Pad - Blue Compound Racing The larger 4mm hole isThe Hawk Performance Blue 9012 Racing compound exhibits medium to high temperature and torque control. It is a great multi purpose pad and is especially useful for lighter weight cars. With excellent modulation and release characteristics, it is no wonder this compound is a best seller with the SCCA!