SF55 Chimney Block SKU: SF55-BK Pinit Quantity discounts available QuantityPrice Quantity -+ Add to Basket DescriptionSBD chimney block is located on the top rail of the sash to act as a dog bolt for extra security.Two are required per sash.Successfully used on our Part Q Test.DocumentationTechnical DWG Drawing: DownloadTechnical PDF Drawing: DownloadData Card: Download