2 Audio 456 THC-2 Audio Video Tape Head & Capstan Cleaners (2 oz each bottle) for Reel to Reel+Cassette+Tape Echo's+Printers+Projector+ Portables+ Handhelds+VCR Beta Machines.(formally SR-Audio) Use Tape Head Cleaning Fluid to enhance frequency response, improve tape tracking, shorten maintenance time and promote extended tape life-. Safe to use on all new and vintage recording/video equipment. Leaves No Residue+Developed by Grammy Winning Producer/Recording Engineer Safe For Use w/ All Brand and Model Reel to Reel,Cassette Decks,Tape Echo,Mini Cassette,Projectors +Does Not Contain Water+Fast Drying+No Acetates or Harmful Chemicals Most Professionals Agree Audio 456 Cleaners are the Best and Safest on the Market