We put our Alfalfa Hay Bales sizes 35cm x 45cm x 90cm in an hydraulic press and 90cm becomes 38cm. We reduce the size and maintain the same weight of 25 kg. Before leaving the press , we placed 3 strap and we can load 900 alfalfa hay bales of 25 kg in each 40"HQ container. (22.500 kg.)Two hours after the customer cut the strapping, the bale returns to its original state.