PVC-coated flask weight rings for keeping your glassware and plasticware stable.                               Use flask weight rings to keep your glassware and plasticware stable and submerged when immersed in water baths. These PVC coated lead rings will not mark or scratch your glassware or bench tops.

Weight: 600g
Inside Diameter: 56mm
Outside Diameter: 105mm

Sold as one flask ring only