Product Information Brand : Baoer Ink Refills : International standard with Push Type Length : About 110 mm Point : Fine nib , about 0.5 mm Suitable for : BAOER, FULIWEN, JINHAO, DUKE (110mm) Rollerball Pens ( If you are not sure , please contact us ) Package : 10 pieces refills(Black color) About Us: 1.We always strive for excellence, innovation, quality products and high standards of customer service. If you have any question or query, please feel free to contact us first , we will take active measures to help you solve the problem within 24 hours Monday to Sunday. Thanks. 2.We ship within 48 hours after we receive your payment. Sometimes parcel may be delayed due to Customs inspections. Your understanding and patience will be highly appreciated.