①. Specification: Material: polyester. Size: 150*5cm per strap Carabiner size: 9mm (width) Suitable swing types: classic swing / garden swing / porch swing / porch swing swing ②. Package contents: 2 x swing accessories 2 x stainless steel carabiners 2 x tree protection mats 1 x storage bag ③. Tips: 1. Choose a tree that is relatively shallow and thick to reduce the friction of the straps. 2. Leave two D - rings on one strap if possible to increase the durability of the D - ring. 3. Make sure the straps and carabiners are tight before swinging. Suggest using thicker tree protection mats to prevent sudden breakage caused by long - term friction. They are easy to tie to the tree with Velcro and are relatively secure. The hammock hangers are made of industrial and durable nylon material, strong and safe, and waterproof. Double stitching straps are stronger and can prevent breakage. The swing tie will not rust or fade easily. All 9mm carabiner D rings are forged from 304 stainless steel. With this swing hanger, one doesn't have to worry too much about swinging. High - strength straps are tear - resistant + stainless steel carabiner / D rings - can withstand 500kg. Suitable for tree swings, tires, garden swings, nest swings, hammocks, and camping. ④. Note: We ship according to the color and quantity of the first picture. If the name is not written, please refer to the content in the description.