The Bow Basic is a more affordable option into Bullworker training. Target your muscles using proven isometric principles as the fastest way to build strength. Includes carrying case and instructional chart. The Bow Basic is ideal for safe, effective strength building and fat burning at home or on the go. *75 lbs spring, not designed for interchangeable springs. Bow Basic Warranty is 2 Years covering manufacturing defects. *It has come to our attention there was improper storage between shipping and Amazon. We understand this is not ideal and may result in unsatisfactory status of the case. We have discounted the units for this reason (you can discard or keep the case).