European E-MARK certified, they are made of high quality plastic material and have a sturdy PC UV lens, not easy to break, ideal for dark nights to help you stay safe and be seen. Size: about length 9.5 X width 3.8 cm. Screw length: 2.2cm. The distance between the two bolts is 7cm. Pack This pack includes 10 rectangular reflectors, each rear reflector with two mounting holes, strongly reflecting light, ensuring safe driving at night. Rear reflectors are perfect for gate posts, bikes, caravans, trailers, trucks, RVs, etc. Convenient to install, stainless steel bolts and nuts are included. These rectangular reflectors are available in packs of 10, each corresponding to a set of screws and bolts. Product Confident - Product listed by , friendly customer service. But if for any reason you are not completely satisfied with the product, we will refund your money. We'll let you know, we'll be happy to help!