Nickel Skimmer Cone, Version B, Dry Plasma (319-540) For Nu Instruments Plasma2, Plasma3, & Attom ES ICP-MS. Suitable for laser ablation applications. Use 10x Magnifier Inspection Tool with Built-In LED Illumination (NC2042261) to inspect cone orifice condition. When not in use, keep cones stored in original packaging for protection. Glass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001