The Plasma Universal Mount supports a plasma or LCD screen on a pipe, 12", or 20.5" Truss. One Mega-Coupler is provided to fasten per mount. The two mounting bars are bolted directly to plasma screen with two 8mm or 10mm bolts per bar. The support bolt holes are drilled for the 50, 100, 150, 200, 300, 400, 660 mm VESA Standards. A set consists of two mounting bars and two Mega Couplers # MLM1/2CS (one for each bar). Additional couplers may be needed for different arrangements and need to be purchased individually. The 8mm or 10mm bolts used to attach the bars to the screens are not included.