View cart “#276XT Smoke Spec” has been added to your cart. #279XT Smoke Spec (does not include lenses) The #279XT Smoke Spec insert with extension bracket. Click here for the Smoke Spec Insert Guide for examples of compatible masks. Click here for insert specs. Instruction Page #279XT Smoke Spec quantity Add to cart Category: Uncategorized Related products Reading LensesPer Pair – Free USPS First Class Shipping – (Reading vision segment 28 mm wide x 19 mm high) $45.00 Select options Additional Anchor Bracket (does not include lenses) Add to cart