Product Specifications: Ball Pens Tip Type: NSTC 0.6mm 0.7mm 1.0mm (NSTC Tips are non corrosive) Ink Shelf Life: 2 years (Complies with EN 71-3 and ASTM-D-4236) Available Ink Colors: Blue, Black, Red, We can provide OEM Manufacturing Facility for above pens provided order quantity is significant.