Floating Foam Tube Racks.Reusable and flexible for a variety of applications.Brightly colored, high density polyethylene foam racks are ideal for floating tubes in water baths, tubs, or beakers.Closed-cell foam resists water absorption so racks can be washed and reused.Racks include detachable carrying handles—easily lift samples out of baths.The blue round rack features unique “X” slits to hold a variety of tube sizes.Not recommended for cleaning in autoclave