Material:Plastic Use:Office & School Pen Novelty:Yes Product Name:Gel ink Pen Refills Material:Plastic Color:Black Size:D2.85*L131MM Tip size:0.38MM 0.5mm 0.6mm 0.7MM 1.0mm Usage:Office & School Pen ink color:black,blue Function:for student & office MOQ:50000pcs Packing:1pc opp Bag