Feature 1Clean and Hygienic: These inoculation rings are fitted with plastic cylindrical tubes to isolate the air and to avoid prolonged exposure to the air, which can cause contamination and compromise use. 2Sufficient Quantity: You will receive 2 inoculation rods of 23cm in length and a total of 90 interchangeable rings. 3Chrome Plated Surface: The inoculation rods are made of copper with a chrome plated surface. The chrome layer effectively ensures the copper from oxidation to copper green and is durable. 4Small Size: These inoculation tools are lightweight and small, with a firm one handed grip for fast and efficient handling. 5Simple to Change: Changing inoculation rings is also very simple, whether in the laboratory or in classroom applications, and the rings with storage tubes are easy to carry.SpecificationItem Type: Inoculation Rod SetMaterial: CopperInoculation Rod Length: Approx. 23cm / 9.1in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List2 x Inoculation Rod2 Bottle xInoculationRing2x Storage Bottle