20mm开孔下水管/20mm through hole water pipe

20mm开孔下水管，适用于水族箱和鱼缸周转箱自制过滤的出水。能承受很高的流量，排水迅速，水族好物。有直头，90°弯头和120°弯头三个配置，可以根据需要选择制作。支撑已经设置好，不需要改动

20mm perforated downpipe for homemade filtered effluent from aquariums and fish tank turnover tanks. Can withstand high flow, fast drainage, aquatic good. There are three configurations of straight head, 90° elbow and 120° elbow, you can choose to make according to your needs. The support is already set and does not need to be changed