Content Container Nailor 0757, 0757D, and 0763 Ceiling Dampers for use in Wood Truss ceilings are component dampers for use with field fabricated plenums (by others). Models 0757/0757D are listed for UL designs L528/L546/L550/L558/L562/L574/L576/L579/L581/L583/L585/M501/M503 and roof/ceiling design numbers P531/P533/P538/P545/P547/P552. Model 0763 is listed for UL designs L528/L546/L550/L558/L574/L576/L579/L581/L583/L585/M503 and roof/ceiling design numbers P531/P533/P545/P547/P552. Models 0757 - Wood Truss • Fiberglass or Steel Plenum by Others • Grille Mount 0757D - Wood Truss • Fiberglass or Steel Plenum by Others • Ducted 0763 - Wood Truss • Steel Plenum by Others • Round Damper Submittals All Submittals Combined Individual Submittals 0757 • Wood Truss Damper • Fiberglass or Steel Plenum (by Others) • Grille Mount 0757D • Wood Truss Damper • Fiberglass or Steel Plenum (by Others) • Ducted 0763 • Wood Truss Damper • Steel Plenum, Insulated (by Others) • Grille Mount IOM 0757, 0757D • Ceiling Radiation Damper • for use in Wood Truss Assemblies 0763 • Ceiling Radiation Damper • for use in Wood Truss Assemblies Catalog