Icy colours K20 Ballpoint Pens. Push-button mechanism. Cartridge Type: 774; with a stainless steel nib that closes securely, ISO 12757-2 H. Type: Available in M, blue, indelible, replaceable cartridge. Pen Design: Plastic Barrel. Clip design: Strong steel clip. Universal lead fit for Schneider Express 735, 740, 775, leads included with gel refill GELION 39 and leads slider 755, 757. barrel colour: Assorted. Packaging and contents: Assorted Blister Card of 10.