The Hopkins Towing Solutions 4-3/8 in. Oblong Reflectors are easy to install and are ideal for any safety application. These amber colored Stick-On Reflectors can be used on trailers and trucks, school buses, agricultural equipment, and more. Hopkins Towing Solutions Reflectors have a permanent mount adhesive back that stays in place, even in adverse weather conditions. And, the Stick-On Reflectors feature durable acrylic reflex lenses that are DOT compliant.