Gas spring adjustable in length for chairs, tables or the like.

A gas spring longitudinally adjustable WHEELCHAIR ADJUSTABLE HEIGHT TABLES OR SIMILAR shows a cylinder (3) OUTSIDE IN WHICH GUIDE displaceably a piston, IN WHICH AN piston rod, which is guided ABROAD from the cylinder (3) EXTERIOR. CYLINDER (3) EXTERIOR shows a layer (43) nitrided THIN, EXTERIOR, HARDENED and a layer (44) NUCLEO BLANDA considerably, INCLUDING THE WALL (11) inside the cylinder (3) EXTERIOR. It SOARS WITH IT resistance to change BEND GAS SPRING dramatically.