... 2:has got CE&Rohs certification 3:good heat dispersion LED lamp holderSpecifications:1)good heat dispersion2)pc cover is good ... if you design drawing by yourself Note:1)just supply led tube shell(including aluminum shell,pc cover,end caps), ... PCB board,driver,or led,wwe e can recommend supplier to you .Outside Diameter30mm Materialpalstic&aluminumColorsilvery white LED lamp fittings, led tube end caps