Bed Leg Glide Extended Height in two (2) heights and two (2) screw-in steel threaded rod sizes. Mounting eights are 215mm and 265mm. Thread sizes are traditional Imperial 5/16" and Metric M8. Sold as individual legs or in sets of 6, 9 or 18 legs. Supplied with Friction Cap to prevent unwinding of the extended height leg. Insert Screws for wooden frames to suit each thread size are available as a separate item.