90mm square x 3mm thick steel bollard.Removable model provides a totally flat surface after removal. It is supplied with ground socket, the base is coupled to the steel post by a padlock (not included) and has 2 handles for help with positioning (requires hole 450mm x 450mm x 450mm deep) .Hinged model has a drop down feature allowing vehicle access and has facility for a padlock at the top of the post (not included) as well as 2 handles for ease folding up and down.Permanent sunken model provides a permanent fixed vehicle barrier.Powder coated finish.