10.5 inch reel on 7 inch player ?

Pioneer RT-1020L 4-Track Stereo 1/4 Reel-to-Reel Tape Deck (1974 - 1977)

Reel-to-Reel Tape Recorders for sale

1/4 Tape - Reel-to-Reel - Blank Media (Tape, Optical, etc)

How Reel-to-Reel Tape Decks Work and My Experiences with Purchasing and Repairs…

Keeping My Reel-to-Reel Machine Running – PS Audio

1/4 inch reel to reel audio tape transfer to digital wav, mp3, CD

Part One: Ken Kessler's Review of RX Reels 7 inch Production Reel

Preservation Self-Assessment Program (PSAP)

Reel to Reel Machines

7 INCH: This is an empty tape reel for use with reel to reel tape players. This reel fits on any open reel deck that 1/4 7 inch diameter tape. ANTI

Takeup Reel, Empty Reel Aluminum Alloy Quiet 1/4 7 Inch for Reel to Reel Tape Players for Nab