The 1.0 HP Square Flange single speed motor is 100% remanufactured and is compatible with pumps such as the Hayward Tristar, Pinnacle and Whisperflo. Rebuilt with High Quality and super efficient, it has a corrosion-resistant outer shell, easy wiring access and has a unique design which increases airflow across the winding. Cooler running motors like this one, will last longer and is made of high quality materials like all copper windings and stainless steel shafts unlike most motors today which use cheaper materials like aluminum windings. Our rebuilt motors are made to last. You can extend your warranty period by one year only for an additional $39. These single speed products are not available for use on residential pools in CA, AZ, FL, CT, RI VT due to local and state regulations regarding energy efficiency. We recommend you select one of our 2 Speed or Variable Speed products for that application in those markets. Return Shipping is the Responsibility of the Buyer ***Returning Merchandise will be accepted only for defective merchandise.*** Free Shipping within the continental USA does not include Hawaii or Alaska We do not ship to Guam or Puerto Rico