i recently purchased a bottle of ultra pure valve oil to use on my bach strad 37. in the past i had only used fast valve oil as i believed it was the best on the market, my purchase of ultrapure changed my mind. ultra pure is a revelation, never before have i used an oil that allowed my valves to have such a smooth, flaweless action, it even provided the necessary lubrication for my sons jupiter student model to perform like a profession model. i strongly recommend this product

Rating: [5 of 5 Stars!]