Home » Product » Windsor Pattern GrilleSelect a CategoryCritical EnvironmentSupply GrillesReturn GrillesHinged Filter GrillesRemovable Filter GrillesCeiling DiffusersBar GrillesDampersDrum LouversAir ExtractorsAccessoriesArchitectural GrillesSecurity ProductsDoor GrillesAluminum ProductsWindsor Pattern Grille 1″ Windsor – 37% Open 2″ Windsor – 55% Open