[Pack of 25] Greener Route™ A4+ (248x345mm Flat) Strong Rigid Cardboard Envelopes/Corrugated Capacity Book Mailers 209x312x40mm, Heavy Duty 400gsm, Peel & Seal, Rip Strip, RM Large Letter

Heavy Duty 400gsm Corrugated Book Mailers A4+ 209mmx 312mm x 40mm (248x345mm Flat) with High Level of Protection Eco-friendly, Recyclable, compostable, Biodegradable Easy open tear strip making it simple for receivers to open the goods Made of 100% recycled and recyclable carton material Royal Mail Large Letter Posting Ready (PIP) Features a micro F flute, making them puncture-resistant and ensuring a very high level of protection Prevent damage for items such as photos Flat size 248x345