Fine filter glass from Summer fun for sand filters. An environmentally friendly alternative to sand with a very long service life. It consists of recycled glass with a grain size of 0.5-1.0 mm. Characteristics: Fine filter glass for sand filters Environmentally friendly alternative to filter sand Grain size 0.5-1.0 mm Specifications: Color: transparency Gender:unisex Material: glass Dimensions: 28 x 10 x 53 cm (L x W x H) Weight: 20 kg