Ever wanted to connect up a second, third, or even fourth nest to your ‘Aus Ants’ outworld? Or perhaps add an external test tube or two as an additional water source? Well, now you can with this double entrance. It has been designed to fit on Aus Ants’ small, medium and large sized outworlds (two will fit side by side on the large). Simply unbolt the existing outworld entrance, and using the same bolts, bolt the new double entrance in its place.