Maximum diameter 3... 0 × total length 98. 0 mm Oil + gel = emulsion. It is oily firmly with a light taste wrote think and gel ink. With the light power can write solid darker. ◆ emulsion ink ◆ ball diameter: 0. 7 mm Body: slurry 3 c 0. 7 (B3A11) and slurry 4 c 0. 7 (B4A11)