SQ-F24-C21 (90º 2-way)The SQ F24 C21 is a 2 way 90 corner for our 8. 5'' mini box truss. This corner will allow you to make a 90 turn to make arch ways or a suspended box. All corners in the F24 series measure . 5m (1. 64') on each side. For a floor standing box check out the 3 way 90 corner. Also, be sure to check out the UJB (universal junction block). This junction allows you to make a wide variety of 90 bends and is reconfigurable! Often a good alternative to the