This is a replacement fine tip brush for Mr. Cement square bottles.
The shape is the same fine tip as MC129 Mr. Cement S and MC131 Mr. Cement SP. MC124, MC127 Mr. Cement's wide type brush can be exchanged and used for spotting, or it can be attached to a finishing material such as weathering color such as square bottle type. It can also be used as it is as a disposable surface brush for painting.