ASTM-A653 CS Type B Galvanized Steel, G-30 Coating LFQ Chemical Treatment
Ceiling boot assembled with C-115 2/16″ zinc coated steel rivets and has a rectangular opening with a 1/2″ drywall flange. The collar is 3 1/2″ tall roll formed 30GA Steel with 1/4″ bead for flex attachment. Collar has 1/8″ finished hem. 1″ top flange.
Knauf Equipment Liner M with ECOSE® Technology Available Thickness: R4 – 1″ & R6 – 1½”
ASTM C 1071, Type I, Flexible (replaces obsolete Federal Specification HH-I-545B.) NFPA 90A/90B, ASTM C 665/1617 Temperature Range (ASTM C 411), Microbial Growth (ASTM C1338, G21)