TIDI Products Ultimate Exam Table Barriers (12/Case)TIDI Ultimate Exam Table Barriers (12 Case) The TIDI Ultimate Exam Table Barriers (12 Case) are made with a poly backing to add strength and an extra layer of protection for both the patient and the exam table. It prevents cross contamination and reduces cleaning between treatments. The roll is perforated every 30 inches for convenient tear off and removal. All table barriers are colored White and available in two sizes: 18 in x 100 ft or 21 in x 100