Black Nitride Shaft Gas Springs Plastic Socket Type Of End extended 17 inchComp'd 10.25 inchStroke 6.75 inchRod diamater 6mmTube diamater 15mmForce(pounds) 30 JR Products Gas Spring Extended Length: 17" Compressed Length: 7.66" Force: 30 lbs. Equipped with EF-PS30 End Fittings MODEL NO - GSNI-5200-30