Check the listing for details. Curt-SecureLatch Channel-Style Lunette Ring (40,000 lbs., 3" ID). Color: Gray, Condition: New, Made in China. Listed at 179.95 USD. MUST READ FITMENT NOTE: SECURELATCH CHANNEL #48651 REQUIRED FOR INSTALLATION (SOLD SEPARATELY). U.S. PATENT# 5,527,356; CANADIAN PATENT# 2,823,001; AUSTRALIAN PATENT# 2014305601. || Description: Drop-in pin accepts lock to deter theft (turns 90 degrees while coupled) Flexible height adjustment for more drop or rise as needed (channel required) Heavy-duty 3-hole bolt pattern fits 11-3/4" x 2-3/4" channel only (#48651) Rated for 40,000 lbs. gross trailer weight 3" inside diameter fits pintle hooks, ball & pintle combinations or clevis bars Cast iron construction is austempered for superior strength and wear resistance Textured, dark grey teridium powder coat for a premium finish Bright gold zinc-plated pin for long-lasting corro .