Good quality professional open sign with hours and metal outdoor sign Name:Stainless steel letter advertising sign Material:304 stainless steel face and return Usage: Outdoor Size:30cm ONLINE SERVICE SKYPE:luyanfeihelen Stainless steel Signs is the common type of illuminated signs; it can be very good to show the contours of the sign even in the night. Basically, light passes through the back of the sign causing it to light up at night. Found in 2005, Dragon Signs Technology Co.,LTD is specialized in manufacturing, designing and developing outdoor LED signs ,metal signs etc, we are a UL certifed sign manufacture in china.