Woody's Archery Supply does not offer for sale nocks for micro-diameter arrows. Generally, these arrows require a nock to fit a .166 inside diameter shaft. Due to the small size, adequate material thickness to produce a suitable, reliable, and functionally stable nock is very difficult. As a result, and following our model of producing safe, high quality products, Woody's Starburst Nocks has chosen to not pursue expanding our product line to include .166 size nocks (G nocks). Additionally, we do not produce nocks to fit the .233 inside diameter arrow shafts. Very few arrow manufacturers offer shafts in the .233 range, so we have decided to concentrate our efforts on fitting the more common shafts of .204 and .244 - .246 diameters, in addition to our .297 - .306 inside diameter bolts.