This Cutler-Hammer M22-D-S pushbutton offers reliable momentary action for your control panel needs. Featuring a flush black bezel and a non-illuminated design, it's built for durability and clear operation. This component is part of the M22 series, known for its robust construction..The Eaton M22-D-S is a non-illuminated, momentary action pushbutton with a black, flush bezel. It is part of the M22 series and is designed for 22mm mounting.Actuator Style: Flush | Bezel Color: Black | Blk: Black color. | Bzl: Bezel (the mounting ring/frame). | Mounting Size: 22mm | Non-Ill: Non-Illuminated (no internal light source). | Sil: Likely refers to the mounting/series style (M22 series).