This Combo Pack by PuriTEST is the all-inclusive answer to your testing needs. The DigiWeigh DW-600BX accurately weighs in FOUR(4) separate units(Grams (g), Ounces (oz), Troy Ounces (ozt), and Carats (ct) with Scale Capacity x Accuracies of: 600 x 0.1 g, 21.2 x 0.005 oz, 19.2 x 0.005 ozt, 386 x 0.1 ct. The 5-pack of PuriTEST acid compounds includes ONE(1) of each solution: 10K, 14K, 18K, 22K Gold and Silver. The PuriTEST 30x Scale Magnification Loupe is made from high grade optical lenses, wrapped in a stainless steel housing, and bought to you in a finely crafted carrying case. This combo pack also includes a set of 1/10th grain Gold Bars in 10K, 14K, 18K, 22K purities and a 5 grain Silver Bar that can be used as bench testing for an accurate comparison, or as an investment. All acids are sealed for GUARANTEED freshness, and all items shipped are shrink wrapped for guaranteed consumer satisfaction by PuriTEST.