Screen wedge made out of black acrylic. Precision cut to perfect 90 degrees, ideal for mounting adjustable nozzles in screen vivarium tops (ie. chameleon enclosures). Protected by a peel-able adhesive label. 4 mounting holes drilled on the sides and one hole drilled in the middle for the misting assembly. Available for premium and value misting assemblies. See the Installation Instructions for the wedge in a ZooMed vivarium screen top.