light boxSLB4 (advertisement light box,display lightbox) 1.the thickness is 3.8cm 2.aluminium frame light box SLB4 (advertisement light box,display light box) 1.the light box is very slim ,and its thinckness is 3.8cm .2.Its frame is made of aluminium ,we also have another many display stands such as feather flag ,roll up banner, pop up display ,folded tent and so on