Iztoss 12-24v Dual USB Power Port Charger Cigarette Lighter Plug Socket for Motorcycle car RV boat the panel is 4.15 x1.67x0.21 inches,include 4x Screws,4x Insulated Terminals,15cm short wires Each plug comes with a splash proof plug to seal the socket preventing water or sand from entering the empty jack. Input: DC12V-24V. Barrel inner diameter:2.1cm/0.83",Barrel inner length:3.6cm/1.42" There are star nuts behind each socket that lock the jack down tightly into either the panel or directly into a waiting 1.13 inch hole.