Feature 1WIDER PANEL: Back cracking device uses a return to 26 degrees of spinal curve, scientific lumbar protection. Widened 25cm/9.8in panel, more comfortable to lie back. 2ERGONOMIC DESIGN: Back stretcher ergonomically designed with 4 adjustable radian, allowing all ages and fitness levels to benefit from the use and improve flexibility. 3SAFER AND STRONGER: Lumbar stretching device is safe and strong, with excellent toughness and compression resistance. 5 minutes of use twice a day to help relieve tension. 4IMPROVES PAIN: Back stretcher effectively treats pain from muscle spasms, pinched nerves, herniated discs, sciatic nerves, degeneration, tight knots, etc. 5LUMBAR SUPPORT DESIGN: Back cracker helps to improve back pain and posture correction. Lumbar support design helps to correct and improve posture. Easy to carry, easy to travel.Item Type: Back StretcherMaterial: PP, SpongeApplicable Parts: Spine, Lumbar Spine, BackApplicable Gender: Unisex, Male, Female .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Acupuncture Panel1 x Adjustment Base1 x Sponge1 x Instruction Book