sizes:48- 50-51-52- 52.8- 53- 53.5 , 54, 55, 58mm. Machined and tig welded from 304 stainless steel. 9 degree inclined bar angle. Approx 733 grams per pair. Very strong severe inpact will bend but will never snap can be bent back into place without weakening , Replacement bars available individually, end weights available seperatley. M6 bosses can be welded in the end to take OEM end weights if requested at a cost of $20 extra.