Diplomat writing instruments have been around since 1922. The Aero collection has been a very popular line crafted in aluminum. The Aero flame is crafted from solid stainless steel. Can you imagine the weight of this pen just reading this? The Aero Flame rollerball uses a standard Schmidt 888 or 5888 refills. The exclusive slip cap closure system is a pleasant closure with a firm and solid feel. It comes with an attractive box and packaging.