EBaySuitable for use with 8mm outside diameter pipe I personally use my coral feeder more for maintenance than actually feeding my corals so have designed this little kit to enhance the tools capability making life a little easier. 1 X 150mm (6 inch) extension pipe 1 x  100mm (4 inch) extension pipe 2 x straight connectors (3d printed in TPU ((rubber)) ) 1 x 45 degree connector (3d printed in TPU ((rubber)) )    1 x short straight nozzle with 2 mm hole (3d printed in PETG) 1 x short straight nozzle with 4mm hole  (3d printed in PETG)  1 X 45 degree nozzle (3d printed in PETG) 1 x 90 degree nozzle (3d printed in PETG) 1 x 135 degree nozzle (3d printed in PETG) All in a custom designed and 3d printed case with magnetic lid for easy storage in the never ending fight against aquarium based clutter! All materials are nice and durable. They are push fit parts but adding a little twist at the end seems to help them grip better. The openings have a tapered design, this is to maintain a consistent fit over time while accounting for wear. Free returns within 30 days if you are not happy for any reason. Custom designs/ideas/sizes welcome, just message me. UK postage only