Features: This 1/4" 10.5inch aluminum open reels tape recorders empty spools with NABs hubs adapters restores sound equipment functionality while delivering studio performances. Precisions engineered 3 hole aircraft aluminum flanges resists warping and reduces wind turbulences for smooth tape operations in reels to reels tape recorders. for sound, electronics enthusiasts, and studio technicians maintaining pioneers for reels to reels systems. for analogs tape restoration projects, live recording, or creating archival copies in professional studio. Features corrosion resistant stainless steel screws and standardized threading that outlasts generics plastic spools, ensuring decade of sound preservation. Specifications: Materials: Aluminum alloy Suitable tape: 1/4inch reels diameter: 10.5inches Applicable: for pioneers, Universal Roll-to-Release Tape Number of holes: 3holes Package Includes: 1PC Open Tape Empty reels note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.