Filter Flask Sleeves Set/7

Made of natural rubber, these Flask Sleeves are designed for glass filter flasks. They enable a clean, firm seal between funnels, vacuum filters, etc and the flask, helping to avoid direct glass to glass contact and providing a cushioning effect. Set of 7 sleeves ranging from 11mm Bot. Diam. & 22mm Top Diam. to 57mm Bot. Diam. & 81mm Top Diam.