H89. Tachikawa T40 (Multi) Pen Holder This holder from Japanese company Tachikawa is a high-quality, lightweight wood. The holder has a rubber finger grip and uses the plastic collar system to hold the nibs. It will hold the following broad edge nibs: Mitchell, Speedball, Tape, Tachikawa. It will not hold Brause nibs; they are too loose.
One neat feature: this holder has a plastic cap to fit over the nib (and the cap can be posted while you are using the holder!). That way, you can leave the nib in the pen and not worry that it will get damaged.
Total length (excluding cap) is 5.75 inches, width is about 1/2 inch thick.