Lightly Used Say goodbye to back and neck pain with the Chirp Wheel+ 3-Pack. This bundle features three different sized wheels for optimal back and neck pain relief and muscle recovery. The 10” Firm delivers targeted pressure to help you massage those problem areas along the spine, the 6” Deep Tissue digs in deep to get rid of your toughest knots, and the 4” Focus targets key pressure points in your neck to reduce tension headaches and relieve neck pain.