WEL SIZE CAT ‘BY cr ‘Dn’ EY EY ‘G6’ HY RY 5335961 5335977 5335979 27 X37 Material is Polystyrene Recommended spacing feet spn Patents: US 7,828,251 B2 , US D356,030 S$ , US DSS8,559 S$ CRATE Fort orn TEXAS 2” Base Spacer Plastic Spacers for Duct Drawn By: CD Branch | Ref.