Vintage/Rare/Original Glock Fixed Rear Sight With No Height Marks On Either End. Just The Grooves To Install On Each End. Sight Does Measure 6.5mm .256" Standard Original Factory Issue In Early 1990's. Manufactured Very Early 1989 For Model 17,19's. Material Black Polymer, White Outline, With Retainer Clip (Black). No Dings, No Scratches In Excellent Condition, (1) Are Available At $39.95 Each. Please Look At  All Pictures, VERY OLD - BUT - NEW !!! Buyer Pays Shipping And Ship Only In The U.S.A. Thanks For Looking At This Listing !!!