Pair of sliding screen clamps for use with PMVTROLLEYXL & PMVSTANDAllow a second TV bracket to be installed on the PMVTROLLEYXL One screen above the other on the front side of the trolley only. Allow a third and/forth bracket to be installed on the PMVSTAND A screen above or below on either side of the stand. One set (pair) of PMVTROLLEYXLSC required per additional bracket to be installed. All PMVmounts products are designed and manufactured in the UK from the highest quality British materials. FeaturesBracket TypeAccessory ColourSilver