... direction air flow Easy mouting clip Removable Eggcrate aluminium grille,air grille ,ceiling grille 1/.Material:aluminium with removalbe core 2/.Neck Size ... CEGL can be used to replace vulacn old style plastic grille 8/ Standarad package as request 9/ There are plastic ... NECK ADAPTOR to attach the back of the grille for installing flexible ductsWe, with 500 people, several distributions, ...