Features: Works with current and past versions of the ARG series strainers Magnifies internal viewing Specifications: Cap for 1" port fits ARG-1000/ARG-1210/ARG-1250 strainers Cap for 1/2" port fits ARG-500/ARG-750/ARG-755 strainers Cap for 1 1/2" port fits ARG-1500 and Up strainers Note: O-Ring Seal is not included. It is recommended that the O-ring seal be replaced each time the sight glass is replaced. Installation and Service Guide WARNING This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov. | Replace the cracked plastic or damaged bronze strainer cap Plastic caps become brittle over time and can crack and leak. Bronze caps can also become brittle with time if galvanic corrosion settles in. These two bronze caps are designed to replace the strainer caps on ARG-1000/ARG 1250 and ARG-1500 Sea Strainers. Key Features Replaces ARG Sea Strainer caps Cast bronze Requires O-ring (sold separately) Specifications ARG-1001-C: Fits ARG-1000, ARG-1210 and ARG-1250 sea strainers ARG-1501-C: Fits ARG-1500 sea strainers O-Rings | These are replacement parts for the extremely popular Groco ARG strainer - which is easily identified by its lack of tie rods and screw-on cap.