The Black Hole Pro is designed for the most realistic putting experience off the course. 24 high visibility zinc coated heavy duty course weighted chains. Electrophoresed first stage followed with tough powder coated outer shell for extra durability and protection. Sturdy all metal construction, all joints welded. Threaded tension connections for a sturdy assembly without any distracting wobble or play. Seamless Matte Black color. Electrophoresed first stage followed with tough powder coated outer shell for extra durability and protection. 24 high visibility zinc coated heavy duty course weighted chains. 12 outer and 12 inner chains equidistantly oriented for zero weak pockets ? reducing cut throughs and pole bounces. PDGA Approved and built to standard PDGA height and size regulation. Sturdy all metal construction, all joints welded. Uniquely engineered design ? assembles or disassembles in under 1 minute. Compact easily transportable disassembled unit. Threaded tension connections for a sturdy assembly without any distracting wobble or play. Standard load distributed base. 2" tall header band ? 25.5" regulation diameter. 21" outer chain tier diameter, 15" inner chain tier diameter.