The Graphic Controls Red Marking Pens 82-39-0202-06 RED MKR are a set of 6 pens designed for use in industrial automation and motion control systems. These pens are specifically labeled with a red color for easy identification and marking. With the model number MKR 82-39-0202-06, these pens are ideal for professionals in the business and industrial sectors looking to efficiently and accurately mark components or locations within a system. This lot of 5 packs provides a convenient and reliable solution for maintaining visibility and organization in complex PLC processes.