Nova 3 Inner Lenses, Package of 10. RPB Safety Part # NV3-722. These Nova 3 inner lenses are made by RPB. They are specifically made for the Nova 3 helmet by RPB. Sold as a 10 pack only. These are the non-tinted version of the lenses. Whether you need inner, outer, tear offs, or cassette lenses for your RPB Nova 3 respirator (Blast helmet), ABS Supply has you covered!