The Lead Ring is perfect for stabilizing vessels and labware or for water bath immersions * Vinyl-coated lead ring will not mark or scratch benchtops and labware * C-Shape Style allows some manual size variation for a customized fit SPECIFICATIONS: * Color: Blue * Fits Flask Size: 1000-4000 mL * Inner Diameter: 2.8 in (7 cm) * Material: PVC * Outer Diameter: 4.5 in (11.5 cm) * Quantity: 1 Each * Shape: O