Stan's No Tubes SRD Spoke Powder 24g. Fills the threads of the spoke and functions as both a lubricant during assembly and a thread lock once built Will treat approximately 300 wheels PTFE powder acts as a barrier, keeping the metal of the nipple from bonding to the metal of the spoke and preventing spoke wind up during build or adjustment Particularly well suited for mechanically locking nipples such as Sapim’s Secure Lock.