Skimmer ConeGuard. For use with Thermo Q, RQ, TQ, ICP-MS skimmer cones to protect cone threads during cleaning. Compatible with Nickel Skimmer Cone (High Matrix and High Sensitivity) NC2046959, Nickel Skimmer Cone (Robust Plasma) TG1045-Ni, Nickel Skimmer (Hot and Cold Plasma) TG1035-Ni, Platinum Skimmer Cone (High Matrix and High Sensitivity) TG1048-Pt, and Platinum Skimmer Cone (Hot and Cold Plasma) TG1039-Pt. Use 10x Magnifier Inspection Tool with Built-In LED Illumination (NC2042261) to inspect cone orifice condition. When cones are not in use, keep them stored in original packaging for protection.Glass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001