Year after year, the Rule-A-Matic 35A has been the switch of choice for boaters the world over. Rule's latest design now includes a removable base for easy cleaning and servicing, a mercury free snap switch tested to over one million cycles and marine grade "blocked" wire. Designed for pumps drawing up to 14 Amps Features For automatic on/off bilge pump control Marine quality corrosion free wiring . Switch design prevents rapid on/off cycling. Environmetally friendly - New Mercury free model Removeable base for cleaning Specification Voltage:For 12 -24v DC Max.Amps: Suitable for pumps drawing up to 14 Amps Dimensions: 127mm long, 40mm wide, 110mm high (at max. lift)