Colour: Black Diameter: 35*7cm Packing weight: 32g/piece Contents of delivery: 1x slider fitness equipment [Application]: Through the sound of our golf training aid, golfers can detect their left arm curvature error to keep the left arm in a straight line position; thereby gradually forming an effective, ideal stroke; suitable for all golfers or Taking golf lessons, especially beginners [Sound prompts incorrect posture]: The golf swing trainer elbow is an integrated alarm device made of special material that will immediately Make a ticking sound. It will remind you that your posture is not correct; you should adjust your posture and keep your left arm straight [Adjustable & Easy to Carry]: Sturdy velcro and buckle make the swing of the golf training aid adjustable, easier to put on and take off; the thick plastic buckle won't scratch the skin like other thin metal buckles; it fits most A human arm with a circumference of up to 33 cm at the elbow [Not easy to change, better warning]: Compared with other suppliers' simple straps, our golf swing trainer wraps around the entire elbow, our golf swing trainer is not easy to move, and it can warn the golf ball better hand [Breathable Material]: Our golf swing training aid is made of high-quality breathable nylon cloth + webbing + Velcro fasteners, durable and lightweight; it will not bring you pressure