Stroke – The maximum amount of distance the rod can travel from closed length to extended length.
Extended length – The total length of the gas spring measured from the centre of one end fit to the centre of the next end fit.
Closed Length– The total closed length measured from the centre of one end fit to centre of the next end fit.
There may be times when no end fits have been specified, this measurement will refer to the length from rod end to tube end (excluding threads).
Beadroll– The beadroll is the grooved section of the tube (reference point three). This feature is used to retain the guide and seal package and prevent the piston from damaging the seal package during extension.