High-precision 300ml volumetric flask. Standard temperature range: 20°C, tolerance ±0.15ml. - Brand: IWAKI - Volume: 300 ml - Material: Glass - Tolerance: ±0.15 ml - Temperature Range: 20°C - Model: 5640FK300S Features of the NEW Standard Series: (1) Complies with the permissible volume tolerance specified in JIS Class A and is marked with an A mark on the product itself. (2) Volumetric pipettes and graduated pipettes have color codes based on JIS R3505-1994. (3) Graduated cylinders have reverse graduations. Thank you for viewing. I am not familiar with the product itself, so please check the photos before purchasing. Although unused, please consider purchasing with the understanding that it has been stored by an amateur. No claims and no returns. Please feel free to contact me. Please note that we cannot ship on weekends and holidays.