Specification Brand : Hyuduo BulletPoint1 : [Easy Replacement] Simple ring replacement with storage tubes for convenient use BulletPoint2 : [Air Isolation] Rings fitted with plastic tubes to prevent pollution and maintain effectiveness BulletPoint3 : [Ample Quantity] Receive a 23cm inoculation stick with 40 replaceable 5mm rings for all your needs BulletPoint4 : [Lightweight Design] Weighing only 10g for easy one-handed operation in lab or classroom BulletPoint5 : [ Material] Chrome-plated copper rod and chrome wire rings for long-lasting use Color : As Shown ExternallyAssignedProductIdentifier : 8841654595113 IncludedComponents : no ItemDisplayDimensions_Length : 8.66 centimeters ItemDisplayWeight : 0.2 pounds ItemName : Hyuduo 23cm Inoculating Loop Kit Copper Reusable Inoculation Ring with Bottle for Laboratory Supplies Consumables 40pc Replaceable 5mm Rings Chrome Wire Material ItemPackageDimensions_Height : 4 centimeters ItemPackageDimensions_Length : 27 centimeters ItemPackageDimensions_Width : 4 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-cell-scrapers-and-spreaders ItemVolume : 1 cubic_centimeters Manufacturer : Hyuduo Material : Copper MeasurementAccuracy : +-0.5% ModelName : Hyuduow95xmsip7g ModelNumber : Hyuduow95xmsip7g NumberOfItems : 1 NumberOfLithiumMetalCells : 1 PartNumber : Hyuduow95xmsip7g ProductDescription : 1. QUANTITY AND SIZE: You will receive a 23cm inoculation stick with a total of 40 replaceable inoculation rings with a diameter of 5mm; Sufficient quantity and model to meet your requirements 2. MATERIAL: The inoculation rod is made of chrome plated copper. The chrome plated layer can effectively protect the copper from being oxidized into patina. Replace the inoculation ring with chrome wire material, 3. PREVENT POLLUTION TUBES: These inoculation rings are fitted with plastic cylindrical tubes to isolate the air and avoid long term exposure to air, which can cause pollution and affect use 4. COMPACT AND PORTABLE: The inoculation stick weighs about 10g, so that does not need to bear too much weight when used; Light weight, small size, one hand hold firmly, fast and efficient operation 5. REPLACEMENT: Replacing vaccination ring is also very simple, whether in laboratory or classroom applications, with storage tubes for easy placement