SIC Goa is a reputed brand of sand filter that uses the bobbin winding method. Sand filters by SIC Goa provide excellent filtration systems for use in water treatment plants and other purposes. They are designed for the filtration of suspended particles and dirt. They are manufactured for efficient and durable performance. SIC Goa sand filters can be used in swimming pools and industr... https://www.sicgoa.com/sand-filter.html