HARDENED LENS (4-1/4 IN X 2 IN), SHADE #11 *Product Type: Welding Lens *Assembled Width: 4-1/4 in. *Assembled Length: 2in. *Packaging Type: Sleeve *Meets ANSI Z87.1 Safety Standards           *Fits Forney 55663 ("Slim Line"), 55666 ("Bandit I"), and 55680 ("Super Slim") welding helmets and most brand name helmets using a 2" (50.8mm) x 4-1/4" (107.95mm) window opening      *UV/IR protection