Check the listing for details. Black Granite Turntable Platform 18x18x1.25 Audiophile Stone Isolation Platform. Color: Black, Condition: New. Listed at 229.00 USD. This platform provides isolation of unwanted vibrations and feedback from floorboards or awkward room characteristics going back in to your products. Those same vibrations are traveling into your components and disrupting the mechanical process of reading a CD, or tracking the groove on a record. Natural granite is one of the densest materials on the planet. All of the above allow your products to function at their optimal performance levels with no unnecessary vibrations thus giving a purer sound. Material: Black Granite Honed Spike: Chrome Black Size: 18" x 18" x 1.25" (with spikes 2.75") Tolerance: +/-0.125" Weight 40 lb Note: Granite is a natural material which has its own natural form and coloration. Note: Turntable shown in some pictures, are not included. Custom Size and Shape Stone Isolation platforms available to fit your exact component. CONTINENTAL US SHIPPING ONLY!!! ALASKA, HAWAII and PUERTO RICO CONTACT FOR SHIPPING COST!!!