1[Foam Tube Rack] Crafted from high density polyethylene foam, this tube rack is soft and lasting, ensuring that your centrifuge tubes remain undamaged and secure during use. 2[Water Absorption Resistance] The closed cell foam resists water absorption, washable and reusable, providing a cost effective and long lasting solution. 3[Floating Design] The foam tube holder can float on the surface of water, allowing for effortless retrieval of samples from the bath without sinking, facilitating efficient laboratory work. 4[Versatile Application] Ideal for use in water baths, tubs, or beakers for floating tubes, this rectangle floating foam tube rack is a practical tool for various scientific experiments. 5[Practical Laboratory Accessory] Whether for educational laboratory classes or professional research facilities, this foam tube rack serves as a convenient and reliable accessory for handling centrifuge tubes with ease. 5 x Foam Tube Rack