Ametek Gemco Geared Rotary Limit Switch 2006-402-L-20-A 2006 = Type "K" Rotary Limit Switch 4 = NEMA 4 Rated Die Cast Enclosure, Watertight 02 = 2 Independent Circuits / Switches / Cams L = Left Hand Shaft Extension from the Enclosure. 1/2 Dia. x 1 & 1/2 Inch Extension with Woodruff Keyway & # 404 Woodruff Key 20 = 20 to 1 Gear Ratio. Cam Block turns once every 20 turns of the main shaft A = Single Pole Double Throw Snap Action Switches. Can be wired for either normally open or closed circuits. 4 Screw Terminals per Switch # 1950-1-B-A-DO 1/4 Turns required to reset the switch Maximum switch setting at 17 turns, minimum at 1/2 turn C-H 10316H-1017-1 (4LBS) H 4.00" L 7.50" W 5.00"