Lead Rings by Heathrow Scientific help stabilize glassware and plasticware on shakers or immersed in water baths. Vinyl-coated lead rings will not mark or scratch bench tops or labware. C-shape format allows some manual size variation for a customized fit.
Specifications: Type: C-Shape, Flask Sizes: 250 to 1000mL, ID: 51 mm, OD: 90 mm, Weight: 465 g, Blue