Al Cass Fast Valve, Slide, & Key Oil June 13, 2012 by The String & Horn Shop » Products » Band » Brass Accessories » Al Cass Fast Valve, Slide, & Key Oil Famous Al Cass Fast is a combination valve, slide, and musical instrument key lubricant will not gum or separate under any weather conditions. 2-oz. bottle. total_sales: 0 Quantity Price: $6.55 Updating cart... People who bought this item also boughtSelmer Tuning Slide & Cork Grease$3.75Herco Brass Mouthpiece Brush$3.15