20mm Diameter Cutout 25mm Diameter Cutout See also different: FSH-FSS1-F Balanced Reed Switch The FSH-FSS1-F is a flush mounted (morticed) version of the FSS1 Series of High Security Door Monitoring Sensors. ES2000 Electric Strike Same cutout in the frame as the ES200, ES2100, ES9000, FES20 & FES20M. LC8811 Power Transfer Device A larger version of the LC8810
