Anna in the FriXion Ball Knock Zone. Introducing designs with butterfly, rose, and cats based on the black and purple body colors that match the world of SUI. The "FriXion Ball Knock Zone" is a new model that allows you to write a darker and longer than previous products. The FriXion Ball Refill Version 2 is loaded into the main unit, using a newly developed premium friction ink with an improved ink concentration, and using a metal refill, the ink capacity is increased by 70% and the writing distance is about 40%.