D(Tube Diameter)d(Piston Rod Diameter)M(Thread)F1(Minimum Extension Force)206/8M6/M850-1000 N228/10M8/M10100-1500 N258/10M8/M10100-2000 N278/10M8/M10100-3000 N288/10M8/M10100-3000 NYangzhou Mingrui Gas Spring Co., Ltd is a professional gas springs manufacturer with 10 years.Our products are widely used in automobiles,furnitures,medical equipments and many kinds of machinery.Sound quality and good service help us get along well with our honorable clients. Since 2005,we have paid more attention in the furniture market because of it's fast growing.The gas springs used in this field have some special requirements.The gas springs should not be rusted in outdoor circumstance for a long time ;It should be silence when the piston rod comes out and in;When the piston rod comes out,it is better to have some damper function;The gas springs should be stable and could work at least 30,000 times.We are excited that our products now have all these four characteristic. Now we have become the only strategic supplier of the world biggest sofa and chairs motion mechanisms manufacturer.Besides, we are also cooperating with 13 big outdoor furniture manufacturers.They are all statisfied with our quality and service. If you think our professional experience in furnitures will help you,please feel free to contact.