The product is made of high-quality rubber without any side effects. Collapse AllExpand All 4.5 out of 5 starsLKERLAN Rubber Golf Tee Holder Set for Practice & Driving Range Mats Share: Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive. Fields with an asterisk * are required **01020304050607080910111201020304050607080910111213141516171819202122232425262728293031*Enter the store name where you found this product*Please select province Please select province *01020304050607080910111201020304050607080910111213141516171819202122232425262728293031Submit FeedbackProduct information: Feedback: 1. High Quality Rubber Golf Tee Holder for Practice & Driving Range Mats (4 pack) 2. 1.5" Rubber Tee Mat Adapters easily fit all size wooden and plastic tee 3. Best Practice Tee and choice of Driving Ranges, Instructors and Players 4. Could apply with any kinds of wooden or plastic tee in the market 5. Purchase includes Rubber Tees only \u2013 ball and wooden, plastic tee are not included