The oil within the cylinder, when it is compressed or extended, moves from one side of the piston head to the other, providing a damping effect. PLACE the scale at the point the strut connects to the door / lid (at the bracket).

Product Type: Door Lid Lift Gas Spring Prop Strut Rod Shock Support Damper
Interchange Part Type: Stabilus Attwood Suspa Lucid SPD IGS API Columbia
Other Interchange Part Type: AVM Spring Lift Master Lift Bansbach Easylift Ace
Type: Nitrogen Gas filled Spring Strut Shock
Other part Number: Gas Spring Prop Strut Shock Damper Lift Support
Material: Steel
Part Brand: Nitro-Prop Strut and Spring
Color: Black Nitrate Coated
Manufacturer Part Number: NP1200-35-6 806yy
Brand: Nitro
Interior / Exterior Part Type: Door Lid Hatch Lift Spring Prop Strut Rod Support
Attachment Method: 10mm Ball Stud or Bracket Mount
Part Type: Gas Spring Strut Shock Lift Rod Tube Cylinder