1,Easy to put up , carry and assemble. No tools required. 2,Different size ... use in exhibition booth 4x4 Portable Pop Up display(PU-58A)Material:AlunimunColour:Silver whitePop Up series:3x1,3x2,3x3,3x4 and ... various advertising trade show equipments.such as:Pop up stands,banner stands,roll up banner stands,flag banners,advertising banner,panels,poster frames,promoters ect. 4x4 Portable Pop Up Display