Description Insulated Metalized Envelopes, 15" x 20" Metallic – 1/2" very thick foam with metallized poly exterior. Dual closure with leakproof zipper inside and exterior self-seal strip. Cost effective cold chain system ensures that your valuable temperature sensitive payloads arrive in optimum condition Multi-layered metalized film composite exterior that reflects 97% of radiant heat Superior seam strength creates airtight construction and crush resistant bladders Airtight payload chamber with heavy duty FDA approved ziplock closure and a flap down sealing tape Insulated with entangled, multi denier fibers in air still bladder Inner Dimensions: 15" x 20" Specifications Color Family : Metallic Envelope & Mailer Closure : Peel & Seal Envelope & Mailer Length : 20"-24" Envelope & Mailer Pack Size : 1 to 25 Envelope & Mailer Width : 15"-19" Brand : Nortech Labs Inc Customizable : No Weight : 7.95 lbs. per Box
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