The Center Cup: Insert into a golf hole or into the To Go Putting Cup. The silicone surface shrinks the golf hole by 1". Recommended for use on putts of any length The Speed Bump Golf Ring: Insert into a golf hole or into the To Go Putting Cup. 360 degree incline dials in the ideal speed. Recommended for use on putts of 6' or less The To Go Putting Cup: Practice anywhere with this portable golf hole. 360 degree incline hones both your speed and aim. Compatible with the Center Cup and Speed Bump Small, lightweight and portable putt trainer can be used indoors or outdoors Golf rings and putting cups are made of durable, heat-resistant, sun-resistant materials Automatically improve your putting speed and aim with PutterCup putting practice rings. Includes three (3) different practice rings: the To Go Putting Cup, the Speed Bump, and Center Cup, to help golfers easily enhance their putting ability indoors or outdoors by adding a little extra challenge. PutterCup putt trainer add challenge to your practice or warmup: the more you use them, the easier putting will feel on the golf course! Practice putting anywhere with the To Go Cup, a portable 360-degree golf putting hole. The inclined design automatically encourages the ideal speed and line. Combine with the Speed Bump in order to adjust height, or the Center Cup in order to adjust hole size. Dial in your putting speed with the Speed Bump. This 360-degree practice ring can be inserted into a real golf hole or the To Go Cup. The inclined design automatically helps you enhance your putting speed, as anything hit too soft, hard, or offline will be deflected. Recommended for practicing putts of 6-feet or less. Enhance your putting aim with the Center Cup. This 360-degree practice golf ring can be inserted into a real golf hole or the To Go Cup. The super-thin (1mm) surface area shrinks the size of the golf hole by 1-inch, encouraging golfers to hone their focus.