The feature of our gas spring: 1) good sealing 2) higher accuracy 3) long useful life 4) Stroke force varies in small range Gas Spring for Car Features:1) pass 180,000 times fatigue times; passed ISO9001:2000 International Quality System Certification2) Good quality: pass 180,000 times fatigue times; good sealing; higher accuracy; long useful life; stroke force varies small range3) Competitive ...