Fig. 2

Eave tube prototypes. Originally, electrostatic netting was fitted over the PVC pipe using a rubber or PVC ring (a–c). Subsequently a second generation of tubes with special inserts (d–f and g–i) was developed. Unfortunately these inserts were too close to the outside of the house, which resulted in the development of an eave tube insert that can slide inside the PVC pipe (j), can easily be stacked (k), and is slightly conical to fit in different diameter tubes (l). 250 of these eave tube inserts (l) can be packed in a box of 60 × 40 × 40 cm