Solar road stud: Regular size: 103*103*20mm or bigger with nail:50mm. Material:AL basement+ PMMA reflector+ LED . Weight: 340-680g. Color:red yellow white blue green. Ceramic road stud: Regular size: 100*20mm or bigger 150mm or 200mm. Material:Ceramic basement+ PMMA reflector or not. Weight: 280-3000g. Color:yellow white . Glass road stud