Maxigrip Bottom Loading Resealable Bags - 280x180mm 75um (Qty:1000)Heavy duty resealable bags that are 75m thick. Insert contents at bottom of bag then simply heat seal it. Tamper evident bag that must be cut or torn open along top of zipper with side tear notches. Bags are then resealable until contents are all used up. Please note: Due to the manufacturing process, all plastic products may have a size and thickness variance of 5%