Here's a complete single blade camera shutter assembly with a 16mm opening. Assembly is 90mm X 95mm. Solenoid sticks out 25mm. The solenoid is a Ledex H-1141-030 precision size 1E Elongated coil rotary solenoid. Rotary stroke is 45 degrees in clockwise direction. 25.4mm diameter by 15.87mm long. Has 441 turns of AWG 30 coil wire, 1000VRMS dielectric strength, 1.5oz weight. Has 3 tapped holes with return spring included, no shaft. Power input: 12VDC; 24VDC. Used, taken from camera body, and in excellent condition. The solenoids alone are selling for around $90 each, much more than our price for the entire unit. We have a good quantity of these at present and are offering them at a great low price.