Most Bell full face models come standard with tear offs posts. These kits may need to be replaced on a periodic basis. Bell offers aftermarket injection molded tear off post kits designed exclusively for the Bell SRV shields including 276, 281, 287, 288, 289, SRV-8, SE03, and SE07. The posts are compatible with Racing Optics, Ultra Shield and Bell .25mm tear offs. The kits install with self-tapping screws.