With this system you can mount and turn closed end barrels from 10.5 mm to 9/16 in. - virtually any large end pen style. Included Accessories: End bushings for 10.5mm, 12.5mm and 9/16" tubes; three 6-inch expansion hose bladders for the 4 projects, a countersink bushing to providing a recess for the refill end of the closed end pen.
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