The KRP-350FR with stainless steel finish has a textured frame and bead so drywall joint compound can be applied in sufficient thickness to conceal the flange. The KRP-350FR is insulated and rated by Underwriters Laboratories for 1.5 hour "B" label in walls and by Warnock Hersey for 3 hours in ceilings. Listed below are standard sizes, other sizes are available. |