Solar Road Stud Specifications(Model: D-143) Model: Solar Pavement Levelled Marker/Stud Flush Type: Size: 14NOKINm dia. * 47mm depth: Weight: 1000grams: Solar Panel: USA brand Mono-crystalline silicon solar panel, high efficiency, 5v, 120mAh: Stainless Steel Safety Locks: 6PCS: Battery: LiFePO4 type, 3.2v 1500mAh: Material