Gibco / Thermo Fisher Scientific A1098801 Vinyl-Coated Flask & Bottle Weight (2-Inch Outer Diameter). A heavy, chemical-resistant vinyl-coated lead stabilizing ring designed to secure laboratory flasks and bottles in water baths and fluid systems to prevent tipping, floating, or spill hazards. MPN / Catalog Model: A1098801 Manufacturer & Line: Gibco (Thermo Fisher Scientific) / Laboratory Water Bath & Cell Culture Accessories Dimensions & Size: 2-inch (50.8 mm) outer diameter, sized to fit over the neck or body of small-to-medium vessels, media bottles, and Erlenmeyer flasks Protective Coating: Thick, chemical-resistant vinyl coating prevents metal-to-glass contact, protecting glass benchware from scratches, chips, or cracking Corrosion Resistance: Fully encapsulates the dense lead interior to prevent oxidation, water-bath corrosion, and chemical exposure in humid or aquatic environments Function & Stability: Adds low-center-of-mass weight to stabilize light or buoyant plastic and glass culture vessels in circulating water baths, shaking water baths, or floatation systems Primary Application: Water bath vessel stabilization, cell culture media incubation, floating prevention, and benchtop fluid handling safety