TianjianNow Offer You a Solutionfor Ever Increasing Power Shortage & Global Warming.poles: 6--12 m galvanized, single-arm lamp pole. Top caliber: 70--90mm Bottom Caliber: 150--220mm Thickness: 3.25--5mm Octagonal & roundsolar system: panel--single crystal silicon orpolycrystalline silicon. battery--12V150AH. High efficiency & service. 4-5years.output power--DC12V, 15W, 25W, 35W, 36W, 55W Switch control: Light control, time control clearanceMaterial: steelSS400/Q235 Hot-zinc-plated 's been painted and polishing procedure before powder coating.