Features: _x000D_ High temperature resistance, maximum working temperature is up to 250. _x000D_ Corrosion resistance, stir bars are chemical inert to most chemicals and solvent, such as strong acid, alkali, water and organic solvent. _x000D_ High lubrication, stir bars have the lowest friction coefficient among solid material. _x000D_ Low temperature resistance, they have good mechanical toughness, and will keep 5% elongation even at -196. _x000D_ No adhesiveness, they have the lowest surface tension among solid material, and will not stick to any substance. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: PTFE _x000D_ Type: C _x000D_ Color: White _x000D_ Size: 5*15mm; 7*30mm; 9*30mm (Optional) _x000D_ Quantity: 5pcs _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 5 x Stir Bars