I was hesitant but ultimately this desk fits my expectation. The only restriction: the authorized diameter for the tube where it attaches desk is relatively small. The translation of the description is approximate and announce an authorized tube 18 cm ... Here we are in the toilet pipe ... ;-) We must therefore think in mm. And 18 mm is not large. I had difficulty in securing the camera on a harness and it is probably impossible handlebars ... Must know.