we sell (GASTERIL) fumigating block with disinfectant and bactericide action for poultry farms, this product looks like a large pellet 700grs block and each block contains 35% pure Paraformaldehyde supported in special formula.the disinfectant of GASTERILis very high and the product has a very well known action as a potent bactericide,fungicide,and virucide.this product is made in ITALY.