Properties: tiguar duo ball 16/8 cm (HARD) is a high-hardness product designed for precise relaxation of muscles and fascia along the spine. Designed for people of all skill levels to release myofascial tension, the tiguar duo ball 16/8 cm (H) should be chosen by people with delicate muscles and under 175 cm tall. It is especially recommended for women. tiguar duo ball 16/8 cm (H) enables deep massage of the extensor muscles, it is designed to press on the muscle trigger points along the spine. This is an ideal solution for people suffering from severe back and neck pain, both due to fatigue and overload. The product is intended for people whose spine is strained every day, especially for those who spend a lot of time in a sitting position. This practical and visually attractive accessory is designed primarily for personal use during individual training and group classes.;Properties: tiguar duo ball 24/12 cm (HARD) is characterized by high hardness and is designed for precise relaxation of muscles and fascia along the spine. Designed for people with larger muscle mass and any level of advancement, to release myofascial tension. tiguar duo ball 24/12 cm (H) by pressing the trigger points of the muscles along the spine enables a deep massage of the extensor muscles. This is an ideal solution for people suffering from severe back and neck pain, both due to fatigue and overload. The product is intended for people whose spine is strained every day, especially for those who spend a lot of time in a sitting position. This practical and visually attractive accessory is designed primarily for personal use during individual training and group classes.