Get mailing bags from the trustable wholesaler in the UK at the least prices. Through our store, we sell Mini Pip Large letter box, Di large letter box, C4 large letter box and C6 small letter box. There is also a range of waterproof mailing boxes that come in a pack of 100. If you are supplier or retailer looking for a material to transport and store the vegetable produce and edibles securely, choose shrink wrap for three pounds. You will also find a large, waterproof, heavy-duty bag for wrapping, which is quite popular among online sellers.