PARKER Rollerball Refill Z41, line width: M - 0.7 mm, blue (S0168730-172730) (Office supplies & stationery)
The mine in stroke M 0.7mm, at issue here, writes as nice as a fountain pen without its disadvantages, such as, placement accuracy, tight closure after writing, frequent maintenance and cleaning. The disadvantage is the mine after a few weeks yet. So