Fa'alelei lau masini fa'alelei i la matou fa'amaufa'ailoga BSPP Male/Metric Male Captive Seal pito i luga.Filifili mai le fa'apalapala o le zinc, fa'apipi'i Zn-Ni, fa'apalapala Cr3, po'o filifiliga fa'apalapala Cr6.Faia i u'amea u'amea, uamea carbon, po'o apamemea, o nei mea fa'apipi'i fa'amautinoa feso'ota'iga fa'alagolago.