| Floor Sleeves & Cover Plates The SSI floor sleeve is an all steel construction that measures 12-11/16" long with a 4" inside diameter. The cover plate is manufactured of durable brass alloy with a concealed hinge. All attachment screws are concealed when the cover plate is closed allowing for a completely flat and safe playing surface. Sleeve and cover installation instructions are available upon request. - 6427 – 8” Chrome Cover Plate
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