The Topspin 12 - 45° needle - connection 20 RS is used for the even distribution of fertilizer solutions in 12 places at the same time without the need for a pressure pump. It is not a pressure irrigation! The EASY RS system is a quick coupling system that allows easy adjustment without additional parts. If necessary, individual branches can be closed to reduce the number of irrigations. Several Topspins can be connected to each other.