The Transco Switch Mech 15A Wafer SMW15 is a 15A, 240V switch that can be configured as either 1-way or 2-way. It features 4.1mm diameter terminal bores, accommodating 4 x 1.5mm² or 3 x 2.5mm² cables, fits into a 22mm diameter hole, and has an M rating of 90.