Fiber Optic Replacement Rods Brownells.
Super Bright For Enhanced Sight Picture
Refurbish fiber optic sights by replacing broken or damaged rods, or change your sight colors to enhance your sight picture with these super-bright replacement rods. Sold in 6" lengths; cut to fit your needs. Available in four common diameters (see below).
Big Book Catalog, Issue:71, Page:316
SPECS: Fiber optic rods, red or green. 6" (15.2cm) long. 1 rod per pak.