Check the listing for details. Extend-A-Post 1-5/8" OD Pipe Extension 2' Long - Clamp Onto 2" Post-45Degree-6Pk. Condition: New. Listed at 132.00 USD. THIS EXTENSION IS MADE FROM 1-5/8" OD (OUTSIDE DIMENSION) 2' LONG. IT IS DESINGED TO CLAMP ONTO A 2" LINE/UPRIGHT POST. SIX COME IN THIS PACK WHICH COVERS 50'. These fast and easy post extensions were designed and are manufactured onsite at our facility in eastern North Carolina. The design was developed and implemented by our head engineer who brings to the table more than 42 years of experience in the industry. While extensions are needed for a variety of reasons, Extend-A-Post is the perfect solution for preventing pets (especially cats and dogs) from climbing and/or escaping your fence enclosure. NEW PRODUCT ALERT! "OVER THE LOOP CAP EXTENSION"! THEY FIT OVER 1-5/8", 2" AND 2-1/2" LINE POST WITH OR WITHOUR TOP RAIL. USING COIL TENSION WIRE? NO PROBLEM! SEARCH "OVER THE LOOP CAP EXTENSION WITH EXTEND-A-POST!