1.LED type: Ring or Dot
2.LED Rated Voltage: 2v/6v/12v/24v/110v/220v
3.LED color: one color or two, Red, Green, Yellow, Orange, Blue, White
4.Switch shape: concave,flat.high round,domed,hyerplane flat ,hyerplane domed
5.Switch size: 10,12,16,19,22,25,28,30mm.
6.Switch operation type: momentary or latching
7.switch material,zn-al alloy,nickel-plated,alluminum,plastic
http://www.topshall-switch.com/