Essential details Place of Origin: China Material: EVA, ABS, PVC, ABS+PVC+EVA size: 33*20*17cm weight: 2KG Gender: Unisex Application: Home Use, Universal Product name: Exercise Equipment Ab Wheel Roller Wheel dia: 10cm Low noise design: won't disturb the family 12 gear adjustable resistance: Yes Comfortable seat: Fit buttocks, sedentary not tired adjustable height: to meet different users Function: Strengthen body, active spine, release pressure Feature: lose weight, physical exercise, exercise heart and lung Non-slip pedal: Enlarged & thickened, more durable