These feeders are a hybrid design which is similar to the original Zippla distance feeder but has a mesh design incorparated which helps bait dispersal and also rises faster on retreive. The smooth base weight ensures no tangles and better bait release as there are no edges to impeed the flow. Small body size Approx. 22mm bore x 40mm long. Medium body size Approx. 27mm bore x 45mm long. Large body size Approx. 30mm bore x 45mm long.