These Knobs are made of 7075 T6 Aircraft Grade Aluminum
They are 1.7" Long
and 0.750" Major Diameter
Tapered up from a 0.405" diameter at the threads
They feature 5/16-24tpi threads that are 0.650" deep with a 0.100" recess
They are extra aggressive for super positive grip and no slipping even when wet or greasy
The real item's color which you receive may varies from the listing picture because of different screen, and different light environment.