Specifications: Material: high-carbon steel with rust-proof lacquer. Diameter: 1.3 cm/ 0.5 inch Adjustable length: 70-120cm/ 28- 48 inch. Application: door curtain rod, clothes pole, shoes rack, clothes pole, coat hanger, DIY projects, etc. Use them in the fridge to separate beverages and keep the cans or bottles from rolling around. It also can use inside various cabinets in travel trailer/RV to keep things from toppling or shifting. Ideal for hanging kitchen stuff. Package includes: 4 x Tension rods How to install tension rod: Unscrew the inner rotating rod to required length, 3-5cm longer than actual shortest distance between two sides of objects, tilt the rod between two sides of objects slightly, make the rod parallel with floor gently, propped up by spring finally. Warm note: 1.There may be small error in size for manual measurements. 2.The friction of the wall and the extension of the rod will affect the use.Generally speaking,the more friction of the wall and the shorter extension of the rod, the better effect of use. 3.The shortest size can bear more items than the longest size. Each rod can bear 1.1 to 2.2 pounds. 4.Recommended length for optimal performance is 28 to 44 inches