1、SCOPE OF APPLICATION: 11 hole empty takeup reel for reel to reel tape machines, fits any open reel machine that fits 1/4 inch tape. 2、11 HOLE DESIGN: 1/4 7 inch empty tape reel comes with an aircraft aluminum NAB flange with classic design 11 hole wind resistance holes for flex resistance and added strength. 3、PERFECT REPLACEMENT: Open reel takeup reel restores your tape recorder or replaces it with a brand new reel, providing you with great sound quality in recording, erasing, re recording, and more. 4、STAINLESS STEEL SCREWS: Silver design stainless steel screws that won't pry open and corrode like other brands. No need to drill out the reel's hardware to remove the reel. 5、ALUMINUM ALLOY: 1/4 7 inch empty reel is made of aluminum alloy, which is strong and durable and not easily damaged. Restores performance and provides a low noise experience.