About this 3D model
sphere 50mm with screw On the 1rst picture: http://www.thingiverse.com/thing:380408 (sphere) http://www.thingiverse.com/thing:370711 (bar mount) http://www.thingiverse.com/thing:380240 (tube cap) http://www.thingiverse.com/thing:379273 (bottle screw)