Detailed Product Description Item No.:KEY-20-120MDiameter:20mm 21.6mm(with holder)Height:13.1mmdiameter of bottom:7.8mmView angle: 120 degreeTransmittance: 93%Material:PMMASuitable for flashlight,spotlight,floodlight,wall washer light and so onSuitable for Edison led,Luxeon,Seoul,Everlight etc