Diameter 90mm/3.54in Laboratory Flask Stand Black Rubber Round Flask Support Base

1.Safe and environmentally friendly, with a diameter of 90mm, can be used to put the flask with a base diameter of less than 90mm. 2.The base is to protect table from being touched by the flask. 3.Strong friction coefficient to insure the bottle is in place. 4.Suitable for all round bottom glassware, convenient and practical. 5.Made of fine rubber material,durable and soft.