1, Retractable plastic ball pen 2, Smooth writing refill 3. Classical design Company Profile1.Topwell Spring Development Ltd was incorporated ... as the design and fabricating of tooling, injection and painting. 3.Topwell is including R&D center, tooling, moulding, silkscreen, ... specialists and undergratuates and advanced engineers. R&D department has 3 ID, 6 MD, and 50 engineers, the department of ...