Check the listing for details. ProX X-SSMP Speaker Stand Mounting Plates for Speakers & Accessories 2 Pack. Condition: New. Listed at 37.40 USD. The ProX X-SSMP Speaker Stand Mounting plate for speakers and accessories is an exterior cabinet mounting flange with a tightening knob, for 1 3/8" diameter speaker stand top tube. These can be used to mount studio-style speakers, lighting, accessories, or used with a platform to mount projectors. Will not break like the ones made of plastic. Do not overload your speaker stands and always extend legs out fully so that lower braces are horizontal to the floor. Speaker stand shown for illustration purposes only and is not included.ProX X-SSMP Speaker Stand Mounting Plate Features: All Steel Construction. Black Painted Exterior. Black Plastic Tightening Knob. Slotted Mounting Holes for Utility. ProX Limited Lifetime Warranty. This Package Includes: (2) ProX X-SSMP Speaker Stand Mounting Plates for Speakers and Accessories(5) 8" Reusable Hook and Loop Cable Ties