Staedtler Premium Ballpoint Pen Triplus 444 Medium Gold Barrel Blue Ink 250ml Whiteboard Spray Conversion to polar coordinates from

Conversion to polar coordinates from rectangular and vice versa

Engineered for durability and performance

Break-Resistant BarrelsDesigned to withstand pressure and drops

making them ideal for classroom situations where computers are shared among students

With a point adjuster

Staedtler Premium Ballpoint Pen Triplus 444 Medium Gold Barrel Blue Ink 250ml Whiteboard Spray Conversion to polar coordinates fromPremium Triangular Ballpoint Pen This premium Staedtler ballpoint pen is the Red Dot design award winner. It features a full metal body in an ergonomic triangular shape with a push button mechanism. The clip, push button and nib are in high polished silver with Staedtler Mars head, embossed on the top of the push button and Staedtler lettering around the upper decorative ring. It takes interchangeable large capacity G2 refill, M, blue featuring