Check the listing for details. (2) Two Sub-Woofer Mounting Plates with M20 threaded for Screw-On Sub Poles. Condition: New. Listed at 26.99 USD. Sub-Woofer Speaker Mounting with M20 threaded for Screw-On Sub Poles Order Includes : (2) Two Sub-Woofer Speaker Mounting with M20 threaded for Screw-On Sub Poles Can Be Used On The Sub-Woofer Speaker Assembly Features:BlackAluminiumOverall Diameter : 4" Inside Depth : 1 "Overall Height 1 1/4" 4 Holes 1/4" Mounted On 3 1/8" Diameter 1 lbs FREE SHIPPING ONLY In the Lower 48 States Most Orders Placed Before 3PM and Paid thru' PayPal Are Shipped The Same Day; Monday to Friday PLEASE NOTE: ITEMS SHIPPED OUTSIDE OF THE CONTINENTAL U.S. (ALASKA, HAWAII, & PUERTO RICO) WILL BE SUBJECT TO AN ADDITIONAL SHIPPING SURCHARGE. THE AMOUNT WILL BE INVOICED TO YOU VIA PAYPAL AFTER PURCHASE. IF YOU HAVE ANY OTHER QUESTIONS, PLEASE LET US KNOW.POR FAVOR TOME EN CUENTA: ARTÍCULOS ENVIADOS FUERA DE LOS ESTADOS UNIDOS CONTINENTALES (ALASKA, HAWAII Y PUERTO RICO) ESTARÁN SUJETOS A UN RECARGO DE ENVÍO ADICIONAL. LA CANTIDAD SE LE FACTURARÁ A TRAVÉS DE PAYPAL DESPUÉS DE LA COMPRA. SI TIENE ALGUNA OTRA PREGUNTA, POR FAVOR DEJANOS SABER.