ProX XT-GRU-PKGX2 Truss Modular 2X Rapid U Grid Dual Package for Lighting - Moving Heads W-Rolling Aluminum BaseplateThe ProX XT GRU PKGX2 makes building a modular lighting grid for moving heads or other entertainment lighting, that is expandable up to 10 U modules is easy to achieve with the XT GRU PKGX3. The ProX grid package includes the beginning parts needed to mount move and store moving head fixtures for stages or performance areas. The XT GRU3024 grid units allow for grid configurations tailored to your needs. You can hang up to10 grids beneath each other