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Product information:1.damper 2. steel and chrome 3. good quality 4. OEM is acceptable 5. reasonable price with excellent quality 6. It is an ideal tools to lift and support commodities 7. widely used in automobile, medical instruments, textile machinery, printing machinery, food machinery and furniture industry etc.8. length: 100-550mm, 210-580mm, 300-700mm, 400-700mm, 600-800mm, 600-900mm etc9. Surface treatment: weld or curl edge10. Bottom treatment: weld or curl edge11. Price is based on the surface treatment, bottom treatment and medium tube thickness12. Test certificate: ISO9001:200013. Up and down times: 110,000 times 14. Warranty: 3 yesrs 15. Weight: 250N-1000N 16. It is an ideal tools to lift and support commodities 17. OEM is acceptable 18. Quality: Airproof and durable 19. In different sizes and different threads;