Both the Virgin and Mechanical grades are made entirely of PTFE and have identical chemical compositions. Both of these PTFE varieties are empty. For some applications, other varieties are available with fillers like glass, carbon, or bronze to increase performance.
Uoo
Hu Johnston
Thrane Strauss
Bazawin
Raymond Ashley
Eskesen Collins
Christensen Hemmingsen
Farrell Castillo
Flanagan Meredith
69vn