... have better properties than the past cat litter su crystal cat litter also called silica gel cat litter Opal ... saving and lasts for long time; one 1.8kg bag cat litter can last as long as one month without ... the box, the proposed way to use one 1.8kg bag is following: one cat, one month, two Cats, ... ,2-7mm,2-8mm. [Packing] 1.8kg bag ,3.6kg bag, 15kg bag,500kg bag. [Remark] Packing and size can be adjusted ...