Outdoor enthusiasts rejoice! We now have standard 5.5/2.1mm DC power cable sets in a waterproof variety. These cable sets are ideal for projects that must weather the weather: dust, water, rain, snow, tornado (not volcano proof!). They are a little bulkier than normal DC jacks because of the o-ring and removable over-screw. The o-ring is what makes the waterproof seal, and the over-screw keeps the two halves connected solidlyComes as a set of two cables — one plug and one jack. The total length of the connected cables is 16″ (40cm). The wires are color coded — red is center, black is ring — to match the most common center-positive polarity.