This boric chunk acid is powerful weapon against all kind of insects, for outdoor, and indoor use. It is also perfect for laboratory experiments and medical use, it is 99% pure boric chunk acid, the price is unbeatable, I am selling it only $55 for 1 kg because I closed my Amazon business store account, this price it’s almost 3 times cheaper then in Amazon, if you by more, I will tray to give you more discount..