DIN UPVC UNION 40MM
PLEASE NOTE: This product is using the DIN standard which means it is a metric fitting and will be compatible with most imported aquariums and fittings such as Red Sea, Cade & Aqua One.
DIN is not compatible with imperial fittings found at local hardware stores. You can use a converter union to convert imperial to metric.
DIN is a technical standard originating in Germany and used internationally