Specifications:Professional and exquisite workmanship makes it very sturdy and durable. High elasticity and good resilience make it very reliable and practical.With the double wheel design, it is more stable and safe to use. Due to two different colors, it allows you to choose the one you like best according to your preference.Made of latex silk, TPR rubber, PP, EVA, foam and steel, it is very durable to use.The diameter of the wheel is 19cm.It is suitable for home, gym, indoor, workout, women, men and so on. You can use this product to complete the transition from beginner to intermediate player. For experienced runners, the straps can be removed and only the wheels can be used for training.Item Name: Abdominal Roller WheelMaterial: Latex SilkFeatures: Large Load Bearing, Shock Absorption, MuteSize Details:Wheel Diameter: 19cm/7.48" (Approx.)Handle Length: 13cm/5.12" (Approx.)Steel Pipe: Length x Diameter: 36cm x 2.5cm/14.17" x 0.98" (Approx.)Kneeling Pad: Length x Width: 41cm x 19cm/16.14" x 7.48" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.Package Includes:1 Set of Abdominal Roller Wheel (Including One Elastic Belt, Two Wheels, One Steel Pipe, One Kneeling Pad, Two Handles, One Center Shaft)