RINGLOCK COUPLINGS ARE SPECIALTY COUPLING THTA CAN BE USED FOR WATER, WASTE LIQUIDS, SLUDGE, FISH TRANSFER AND OTHER AGRICULTURAL OR INDUSTRIAL WASTES. THEY PROVIDE EASY CONNECTION OF SUCTION/VACUUM OR DISCHARGE LINES AND ARE TYPICALLY ONLY USED IN CERTAIN STREET SWEEPER, VACUUM TRUCKS, OR AGRICULTURAL APPLICATIONS. THERE ARE TWO VERSIONS OF FEMALE, THE STANDARD ARE "ROUND BACK" BUT THEY ARE ALSO AVAILABLE IN "SQUARE BACK WESTERN STYLE" ON SPECIAL REQUEST. AS FOR THE MALE THE STANDARD ARE "NARROW RING"