capable of being elongated or shortened by the insertion or removal of intermediate pieces

Full Title

Supporting, suspending, or attaching arrangements for lighting devices (F21V17/00, F21V19/00 take precedence; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q, stands for supporting apparatus or articles in general F16M11/00); Hand grips > Pendants, arms, or standards; Fixing lighting devices to pendants, arms, or standards (adjustable mounting F21V21/14; construction of posts not peculiar to use with lighting devices E04H12/00) > capable of being elongated or shortened by the insertion or removal of intermediate pieces