Teeter Hang Ups Better Back Adjustable Acupressure Nodes are designed for use with the ComforTrak and Flex Technology Bed, a signature feature of Teeter’s newest Contour and EP-Series Inversion Tables. Tension tends to concentrate around the acupressure points along the meridians of your body. The Adjustable Acupressure Nodes are an optional accessory designed to place pressure on muscle trigger points to release tension, increase blood circulation and relieve muscle discomfort. Place any of the eight nodes along the ComforTrak or Flex Technology bed or the Lumbar Bridge (sold separately) to help target tense muscles. Simply insert and twist to lock in place – the bed design allows you to adjust the placement of the nodes wherever you need them. An assortment of node heights allows you to customize the pressure for the ultimate in relaxation and relief. Invert at a static incline to maintain steady pressure or oscillate (rock rhythmically up and down) to create body slide over the nodes for a shiatsu-style massage. The NEW and IMPROVED Better Back Adjustable Nodes (8 pack) are more durable and versatile than ever and are designed specifically for use with Teeter Hang Ups EP-550, EP-850, EP-950, EP-560, EP-860, EP-960, EP-970, Contour L5 and Contour Power Inversion Tables.