The specifications are inner diameter 6mm*outer diameter 9mm*length 4m The small strap is black and is used to fix the elastic rope on the shore of the swimming pool. Swimmers use the elasticity and resistance of the elastic rope to exercise. Popular aquatic training aid to build strength and endurance. Suitable for water training, increases effective training of the intensity of the swimming, training endurance and strength. Lightweight and fast-drying,ome with storage mesh bag. Thanks to its quick drying design, easy to clean after each use. Training rope helps improve swimming and adjust the whole body quickly. Has adjustable hip strap, you can hang the adjusted fit Fit free, even snugly and easy to wear or take off. Swim tether stationary swimming belt pefect for anyone who wants to stay fit and wanna a nonstop swim, to athletes who want a training work out. The cord is strong,suitalbe for both adults and children. One loop is for installation. So you can hang the belt to any pole around the swim pool. Swimming pool equipment swim belts for kids, pool workout equipment, pool exercise equipment, pool equipment storage. The adjustable nylon belt is for attached to an elastic tether which you can fasten on the pool's ladder or any other fixed place. Swimming tempo trainers, stationary swim belt, endless rope resistance trainer. Scuba weight harness static swimming belt, progressive swim trainer, aqua jogger belt, level 1 swim trainer, No tools are required and no changes to your home pool or yard. Designed to adapt to in-ground and above-ground pools, outdoor and indoor pools, Effective low-impact workout for swimmers of all ages and proficiency levels. Swimming exercise equipment swimming tools for training, stretch cords for exercise, stretch strap loops, elastic rope cord Specifications: Material: Latex Color: Yellow Size: Length: 4M Resistance band inner diameter: 6MM, outer diameter: 9MM Black belt, length 1.2M, adjustment range is about 55cm-105cm Net weight: 240g Reminder: 1.All pictures are professionally color-coded, but due to the different ambient light and different display device settings, there may be some deviations between the pictures you see and the items themselves. Please understand. 2.The data is measured manually, there may be some deviation, but it does not affect the use. Package Including 1 * Elastic rope 1 * Swimming belt 1 * Strap 1 * Net bag