25 Piece Pack 340x240mm LARGE Bubble Padded Envelope Bag Post Courier Mailing Shipping Mail Self Seal CRACKED.com, The Mponeng Gold Mine in South Africa is the. 25 x White Padded Bubble Envelope 340mm long 240mm wide Ideal for business parcels, moving house, Sending packages or for resale (non branded) Premium Quality & Lightweight for postal savings. Seamless bottom affords additional cushioning protection along with greater overall strength and safety. High slip AirCap cushioning material allows faster, easier product insertion. Fully laminated kraft and air cellular construction provides outstanding stiffness and puncture resistance. Convenient self seal closure saves labor and eliminates the need for staples and tape, while forming a water resistant, secure package.