Item Package Dimensions L x W x H:4.13 x 2.44 x 1.81 inchesPackage Weight:0.05 KilogramsWarranty Description:2 years warrantyMaterial:SiliconeNumber of Items:1[Adjustable Resistance]: Our resistance valve suitable for almost everyone without side effects. Easy to adjust, which can meet different needs and achieve better results.[Building Muscle Strength]: This trainer helps improve your fitness, strengthen your muscles, and practice stress management. Also can help you improve the muscles.[Improves Exercise Performance]: GULZIIYA fitness exercise trainer can help you build up your abdominal muscles which will improve your performance. Ideal for athletes, musicians, and average person, also suitable for sports that need higher energetic performances like swimming, athletics running, gymnastics, martial arts, and other outdoor activities requesting higher physical activity.[Easy to Use]: Lightweight and designed with soft silicone materials very safe to use. Besides, With the small size you can take it anywhere you go. Very easy to use and clean.[Better Gift for Your Love One]: You can see a difference if you regular use it, more functionality and better for your training program in daily life, its also a good gift for your friends and family!