Pack of twelve multipurpose stirring rods made of high quality polypropylene. Each rod measures 9.8 in total length and is 0.4 in diameter. Designed for use in professional laboratories but is an ideal choice for science classrooms and household use. Autoclavable with superior chemical durability and heat tolerance. Can withstand temperatures ranging from -20?C to 135?C. Eisco Labs proudly manufactures its own products using state-of-the-art equipment and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.