Fence or railing

A fence or railing comprising:

• an elongated vertical post, of essentially rectangular constant cross-section, made in one piece of extruded plastic material and formed, along the full length of each of the outer walls thereof, with an inwardly directed U-shaped channel having sidewalls defining two guide slots facing one another and extending the full length of said sidewalls;
• said post further having a central open-ended bore of non-circular cross-section;
• a support base comprising a flat plate and a pedestal upstanding from said plate, said pedestal having a non-circular cross-section like that of said post central bore and snugly fitting non-rotatably into the lower end of said bore;
• at least one area-separation section comprising horizontal top and bottom rails interconnected by vertical struts, wherein common ends of said rails are slidably inserted into one of said post channels;
• essentially flat spacer elements having identical constant cross-sections including outwardly projecting lateral wings slidably inserted in said guide slots of said one of said post channels, said spacer elements comprising:
• a first spacer element between said base plate and said bottom rail, supporting said bottom rail and resting on said base plate;
• a second spacer element between said two rails, supporting said top rail, and resting on said bottom rail, and
• wherein said spacer elements have an outer face falling flush with the outer wall of said post having said one channel to act as masking elements for said one channel.