This Bikejoring antenna keeps the dog´s bungee leash from tangling into the front wheel. For bicycles and scooters. Safety is important in high speed activities; with the Bike antenna the bungee line is much less likely to tangle into the front wheel. Bike antenna fits on most bikes and is simple to assemble. It is possible to detach the antenna without dismantling the antenna mount off the bike, practical if you also use the bike without your dog. The Bike antenna is light and sturdy with a flexible base to follow the dog´s motion through corners and varying terrain. When fitting the Bike Antenna the minimum distance to be used under the handle bars should be 10 mm. Note. Additional Kainpo Nylon Attachment Ring is sold separately. Weight 246 g Dimensions Length: 63 cm Opening diameter: 28.6 mm Materials Steel spring Aluminum