0.5 LB C-SHAPED LEAD RING.Bel-Art C-Shaped Lead Rings for Flasks, Diameter Inner: 4.31 cm, 1.7 in., Diameter Outer: 7.62 cm, 3 in., For Use With: 125 to 500mL Flasks, Weight: 230 g, 0.5 lb., Autoclavable: Not Autoclavable, Bright Green, Accessory
1.0 LB C-SHAPED LEAD RING.Bel-Art C-Shaped Lead Rings for Flasks, Diameter Inner: 5.1 cm, 2 in., Diameter Outer: 8.89 cm, 3.5 in., For Use With: 250 to 1000mL FlasksmL, Weight: 450 g, 1 lb., Autoclavable: Not Autoclavable, Bright Green, Accessory
1.5 LB C-SHAPED LEAD RING.Bel-Art C-Shaped Lead Rings for Flasks, Diameter Inner: 5.58 cm, 2.2 in., Diameter Outer: 10.16 cm, 4 in., For Use With: 500 to 2000mL FlasksmL, Weight: 680 g, 1.5 lb., Autoclavable: Not Autoclavable, Bright Green, Accessory
2.0 LB C-SHAPED LEAD RING.Bel-Art C-Shaped Lead Rings for Flasks, Diameter Inner: 7.11 cm, 2.8 in., Diameter Outer: 11.43 cm, 4.5 in., For Use With: 1000 to 4000mL FlasksmL, Weight: 900 g, 2 lb., Autoclavable: Not Autoclavable, Bright Green, Accessor