Our Aluminum Practice Size 4" Golf Cup conforms to all PGA & USGA specifications for tournament play. Our manufacturing process involves anodizing each golf hole cup before applying a bright-white, UV-stabilized powder coating to prevent damage to the aluminum from fertilizers and soil additives. The results are high-quality and durable putting green cups. We have supplied this exact golf cup to PGA golf courses worldwide for over 20 years! Why not have the same golf cup at home?