Made of ABS and EVA material, durable and reliable, wear resistant.Perfect core sliders exercise equipment for office workers, students, fitness enthusiasts and people who like daily workout. Efficient and easy to use.Function:Target individual muscle groups, workout the entire body, build core strength and improve range of motion with discs sliders.The discs core sliders can work smoothly on all surfaces. The smooth plastic side works on carpet, rug or cloth face, while the fabric side works on hardwood, laminate or tile floors.NOTE: The size is just for reference, there may be exist a measurement error of 2-3 cm, please check whether it fit2pcs Exercise Sliding Gliding Disc Fitness Core Slider Sport Full Body WorkoutSpecifications:Condition: NewMaterial: ABS,EVADiameter: Approx. 17.8cm / 7.0inPackage list: 2 * Sliding Gliding Discs