Fill with your filtering media: carbon, resins, water softeners, etc. Mesh Size: 0.09 cm x 0.09 cm w/Drawstring Why We Love It: Does not hinder water flow Ideal for Pond filtration Safe for fresh & salt water About Blue Ribbon Blue Ribbon Pet Products, Inc was established in 1975 based on a vision to bring to the industry the most exciting and innovatice products for your pets at affordable pricing. Setting the standard in new market trends, we continue to introduce NEW & unique products every year. Many of our designs are copyright protected assuring you the utmost in quality and detail.