This animal exercise rolling ball is designed with transparent color convenient for you to observe the condition of your pet. There is a buckle to keep your pet from getting out making sure your pet s security when palying or exercising. Your pet will not feel stuffy because there are deisigned with many holes keeping your pet can breathe smoothly. This animal rolling toy is made of plastic material which is safe and durable you can order and use to your pet without worries. There are detailed instruction on how to use and how to assemble you do not need to worry about assembling. Material: plastic. Color: pink blue green orange. Size: show as pictures. How to use: Put the rolling ball on ground indoor or outdoor with being covered then put the animal in the ball and it can be used. Please make sure your pet is within your range. How to assemble the cover: There is buckle to fix the ball. Connecting the buckle of cover with the running ball and screw the cover until it reaches the end. There are pit on the cover and embossment on the running ball you must makes sure the 2 sides are connected or the cover will be loose. 1* animal exercise ball.