Looking for a way to make your multi-student tables work for testing situations These test dividers are an easy solution. The dividers clip on to any tabletop and provide just the right amount of privacy for test taking. The panel is made of a sturdy black plastic, which provides a dense, private divider. The adjustable clamp holds the panel in an upright position and fits tables through 1-1/4 thick. Sold in a set of 3. The dividers measure: 1/4"W x 19-1/2"D x 14"H.