Kaweco Perkeo Fountain Pen - Cotton Candy Medium Kaweco Classic Sport while on the barrel are

while on the barrel are a built in level

Flap with magnetic closure

It is a very alkaline ink (ph of 8 to 9)

They are designed to be used with the very popular Apica A5 notebooks

Kaweco Perkeo Fountain Pen - Cotton Candy Medium Kaweco Classic Sport while on the barrel areThe Perkeo is a stylish entry level fountain pen perfect for students and beginners. It carries on Kaweco's hallmark combination of classy and offbeat styling elements with its octagonal cap, 16 sided barrel, and funky two tone color schemes. Its triangular grip section makes it easy to hold at the best angle for smooth ink flow and effortless writing. The transparent threaded section where the grip meets the barrel acts as a hidden ink window,