- Designed specifically for wooden door installation with Self-locking housing - 3/8" diameter press to fit - Ruthenium Over Gold Reeds - #22AWG UL approved Lead wire - Maximum Contact Rating : 100VDC 0.5A 10W - Wide Gap up to : 3/4" ( 20 mm ) with Rare Earth Magnet designed for wooden door - Dimension (mm) : ( 19 L x 9.5 Dia ) - Safety approvals