Since 1998, SELEWARE is selling Kitchenware and Houseware items, all need comply with BPA free, Phthalate free, Environmentally friendly and healthy, Safe, long term use.PACKING LIST?1 Swing Hanger?39.4"/ 3.28ft Chain?1 Spring?2 Carabiner?2 Wood Screws?2 Expansion BoltsATTENTION?Its maximum weight is 425 LB. Be sure the surface is strong enough to support the weight and forces involved which you are mounting.?For safety, pleases always check all the parts assembled or welded well for using.???If you are dissatisfied with any reason, return your order for 30-Days for full refund. Keeping you satisfied and providing you with the friendliest customer service is our number one goal. Better products, and the best in customer satisfaction.