Specification AgeRangeDescription : adult BatteriesIncluded : 1 BatteriesRequired : 1 Brand : THYXGS BulletPoint1 : ● Parameters: There are 10 hardness pens in the box, each 130 mm long and 6 mm in diameter. BulletPoint2 : ● Material: The Mohs hardness tester is made of PH10 crystal with accurate values. Made of pure stainless steel, it has good texture and exquisite appearance. BulletPoint3 : ● Test level: Talc-1, Gypsum-2, Calcite-3, Fluorite-4, Apatite-5, Orthoclase-6, Quartz-7, Topaz-8, Corundum-9, Diamond-10. BulletPoint4 : ● Precautions: Please handle with care during use, pay attention to the moderate scratching force, neither too light nor too heavy, and pay attention to maintenance for long-term use. BulletPoint5 : ● Application: This hardness test pen is suitable for gemstones, tiles, floors, glass, mobile phone screens, minerals, concrete and other thicknesses, including materials such as polyethylene, polyester and aluminum foil. Color : One Color ExternallyAssignedProductIdentifier : 8040304441927 IncludedComponents : 1 TDS Meter + 1 User Manual ItemName : Mohs Hardness Pen, Hardness Test Kit, 1-10 Scratch Tester Hardness Test Pen, W/Storage Box, for Industrial Mineral Identification Kit Gem Jade Jewelry ItemPackageDimensions_Height : 0.67 inches ItemPackageDimensions_Length : 5.13 inches ItemPackageDimensions_Width : 1.1 inches ItemPackageQuantity : 1 ItemTypeKeyword : hardness-testing-apparatus Manufacturer : THYXGS MeasurementAccuracy : +/-0.5% ModelName : WLMDC ModelNumber : TDS ECO (1 TDS Meter) - 1 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : YZ0152003336 ProductDescription : Welcome to the "THYXGS" store! Wish you a happy shopping~