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Make sure that none of these parts are missing and/or damaged before beginning installation. If there are parts missing and/or damaged, please stop the installation and contact Premier Mounts (800-368-9700). Please review all WARNING and CAUTION statements (see Page 8) before beginning the installation of the PRC. AST-2446 (Qty 1) PRC-LA (Qty 1) The AST-2446 is not included with the PRC-LA. Customers may purchase the AST-2446 separately or use a custom length of 1-1/2” NPT. M4 x 10mm Phillips Pa