2R Designs Finger Pads
The same finger pads aka bearing caps that come with the 2R Designs Circulator. They should fit most R188 3/16 variant using spinners (PLEASE CONTACT US TO CONFIRM). Threaded with a slight concave towards the center and are very easy to remove. They are sold in sets of 2 (1 male, 1 female).
Material: Stainless Steel (Matte finish), Electroplated Black, Electroplated Rainbow
Size (Diameter): 22mm