Usage Tips:Golf Simulator Tees 19Pcs for Indoor Practice Turf Mat Driving Range Training1. Put these plastic golf balls in the garden, outskirts, or even your corridors, and practice your golf skills wherever you want, and you can have more possibilities. 2. Longer Distance: The use of our plastic golf ball can effectively reduce the resistance of the club face when hitting the ball. Using a golf ball can effectively help you hit the ball higher and farther. 3. Consistent Tee Height: that the ball is at the exact same height every time an iron is hit from the tee. Allows you to better discover your own strengths and weaknesses and improve your golf skills. Suitable for Novices: Children can tee off and hit the ball without supervision. These practice golf tees do not require experienced golfers to push the tee into the hard ground on the tee box. Color: yellow & pink & blue & green Material: plastic Package Contents: 19 x Golf Tee(10 x small+9 x large) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.