I have 7 one quart bottles of Redline MTL Manual Transmission Fluid 75w80. All bottles are unopened and sealed.
It is a very high quality synthetic oil for manual transmissions. It is an AP4 gear oil.
This is the info from the Redline Oil website https://www.redlineoil.com/mtl-75w80-gl-4-gear-oil
This is a top of the line full synthetic oil that sells for about $23 each. I have had these setting on a shelf for quite a while and not longer have a car that uses this oil. I will sell 1 bottle for $15 or all 7 for $80, plus an 8th opened (unsealed) but clean & unused quart.
look on the ECS Tuning site for some information on the oil as well as confirmation that the oil I have, while older, is equivalent to the current oil. They have a cross reference table . The cross reference number (UPC) (clearly seen in my photos is show contact info
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https://www.redlineoil.com/mtl-75w80-gl-4-gear-oil