High Quality Elastic Cord: 2Pcs Approx. 4.5Mm X 2.2M And 2Pcs env. 4.5Mm X 1.4M, Good Elasticity, Stability And Ease of Use. (The Diameter of The Rope Has Been Improved, You Can Be Sure to Choose). Replace The Chair Rope, Repair Kit Universal Adjustment Fitting The Most Replaced Benches, Canvas Rest Chairs, Armchairs, Folding Chairs, Anti-Flea Chairs And Gravity Chairs, Making Them Safer, More Comfortable And Firmer. Easy to Install, Each Side of The Tilt Cable Is Made of Metal, Which Makes Its Installation Faster And More Convenient. Affordable: With A Premium Alternative Line, You Can Save Money By Changing The Lace of The Bench So That You Don'T Have to Buy A New Chair to Place It . It Is Recommended to Change The Laces Every Two Years to Maintain Excellent Comfort.