This product is mainly made up of air bag, lining bushing, the conduit, plastic attachment, the valve of the tractor, the inflatable ball, the nylon adherent buttons and so on. The Perfect Solution For Neck Problems Package Included : 1 x Neckline Tractor Pillow ( 3 Layer ). Be fit for office worker who seat at office at the whole day and old people that has problem of cervical spine. 3-Layered Air-Inflated Cervical Vertebra Tractor Effective For Releasing Stiffness, Muscles Spasms And Stress On Neck, Head And Shoulders Area Improves Blood Supply To Neck Muscles, Tendons, And Ligaments To Promote A Total Relaxation Especially Designed To Maintain The Natural Curve And Alignment Of The Neck Material : PVC Plastic, Rubber Conduit || 3-Layered Air-Inflated Cervical Vertebra Tractor Improves Blood Supply to Neck Muscles, Tendons, and Ligaments to Promote a Total Relaxation Package Included : 1 * Tractor Neckline Pillow Improves Blood Supply to Neck Muscles, Tendons, and Ligaments to Promote a Total Relaxation.