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The famous Al Cass "Fast" is a combination valve, slide, and key lubricant that will not gum or separate under any weather conditions. Al Cass Fast Valve, Slide and Key Oil Al Cass Fast Oil has been enduring favorite of brass players for decades. Al Cass Oil is a combination valve, slide and key oil designed for long-lasting lubrication. Al Cass is a petroleum-based oil and is available in a 2 oz. bottle.
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