Blank panels shall be Middle Atlantic Products model #HBL4. Blank panels shall be 4 rackspaces in height with a black brushed and anodized finish. Blank panels shall be 19” wide. Blank panels shall be GREENGUARD Indoor Air Quality Certified for Children and Schools. Blank panels shall be RoHS EU Directive 2002/95/EC compliant. Blank panels shall be manufactured by an ISO 9001 and ISO 14001 registered company. Blank panels shall be warrantied to be free from defects in material or workmanship under normal use and conditions for the lifetime of the panel.