High efficiency carbon filter is totally different than general carbon filter,it is made of carbon fiber,coconut toner,wood toner,all materials is with much higher quality level,denifitely no toner leakage.

With almost more than 10 times cost higher than general carbon filter.

Above filter is sample picture for USA cyanide filtering usage,the middle white one is 100% imported materials maded.Room temperature resistance.

Welcome to ask for sample test.