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 1High temperature resistance, maximum working temperature is up to 250 2Corrosion resistance, stir bars are chemical inert to most chemicals and solvent, such as strong acid, alkali, water and organic solvent 3High lubrication, stir bars have the lowest friction coefficient among solid material 4Low temperature resistance, they have good mechanical toughness, and will keep 5% elongation even at -196 5No adhesiveness, they have the lowest surface tension among solid material, and will not stick to any substance