Streamlight Lens for Knucklehead Flashlights. The Streamlight 906026 is a replacement lens for Streamlight Knucklehead Flashlights. We carry a big variety of Streamlight replacement components to let you replace worn out parts on almost any Streamlight Flashlight - so you can keep your Streamlight Knucklehead Flash Light going strong for years to come Features of Streamlight Replacement Lens for Knucklehead Flashlights: Replaces Lens for Knucklehead Flash Lights Package Contents: Streamlight Lens for Knucklehead Flash Lights Streamlight Lens for Knucklehead Flashlights 906026