The Marble Arms .375" Fiber Optic Glow 37-W Front Sight provides enhanced target acquisition with bright orange fiber optic technology and durable steel construction.Marble Arms Model 37-W Front Sight.375" diameter fiber optic insertOrange glow fiber optic for improved visibilitySteel construction for durability and reliabilityFront sight configuration for riflesIdeal for hunters and sport shooters seeking improved accuracy and faster target acquisition in various lighting conditions.