LK-1339 13"x39" Aluminum Rectangle Base/Top Plate Box Trussing Light Columns13"x39" rectangle heavy duty aluminum base plate for square aluminum trussing This base has 3 sets of truss mount locations: center, left and right Holes in center of base for truss poles 290mm. x290mm. fitment Fits all major name brand aluminum trusses Includes four half couplers, pins and clips for mounting truss to base Convenient carrying handles and rounded edges on base 10mm. thickness Unit weight: 19 LB.