Check the listing for details. Pre-Calibrated Gold Test Solution: Stannous Chloride + Tin Keeper FROM USA. Condition: New. Listed at 6.95 USD. Gold Test Solution (SnCl + HCl + H2O + Sn) Volume 1 Fluid Ounce (30 mL) Stannous Chloride Formula Purity Grade Acidified With SnCl 99.8% Pure ACS Reagent Grade Hydrochloric Acid Tin Formula Purity Sn 100% Pure Water Purity Distillation 100% Pure · Steam Distilled · Filtered · Ozonated Dropper Bottle Drops/Ounce 650 You are purchasing 1 Fluid Ounce (by volume) of Gold Test Solution. This solution contains Stannous Chloride (SnCl), Hydrochloric Acid, and a piece of Tin “keeper” (Sn). The item ships in a 1 Fluid Ounce Polypropylene bottle. This test solution has been pre-calibrated and is ready to use. No mixing required. The piece of tin bullion keeps the solution balanced for ten times longer than other test solutions. FREE EXPEDITED SHIPPING We ship THREE TIMES A DAY, 7-Days a week. Your item is guaranteed to be in the mail the SAME DAY you place your order. Transit time from California is 2-4 days throughout the USA. Our bottles are made of sturdy polypropylene. We shrink-wrap the screw tops and seal the bottles in plastic to ensure a spill-free journey.