Universal Replacement Pneumatic Hydraulic gas lift cylinder office chair bifma x5.1 en 1335 gas lift chair cylinder

Ø50

OR

Ø38

60

OR as request

10 

OR as request

Class

Class is different from the thickness of medium tube & outer tube.

Class 1---1.2mm, cheaper price, two year warranty(Normal)

Class 2---1.5mm, cheaper price, three year warranty(Better)

Class 3---2.0mm, expensive price, five year warranty(Much Better)

Class 4---2.5mm, more expensive price, five year warranty (Best)