Lingtong Square extrusion M544 has 4 system grooves and 4 grooves on two faces for fixing fabric. The fabric print can be applied on both side of the frame. The Double side fabric frame can be used for multiple applications: trade shows; propaganda; poster; decoration; backwall in exhibitions and events, etc. The installation method of picture is sewing the fabric with silicon strip and insert into the frame. The main material is aluminium. The size of Square Extrusion is 40*40mm. The weight is 1.490kg/m.