iron Log Boom Chain Boom Chain iron Grade U2 and U3 Anchor ChainSize: 3/4"x7', MBS: 55000LBS, 19.68KGS/PC3/4"x7', MBS: 75000LBS, 19.68KGS/PC3/4"x9', MBS: 75000LBS, 25.1KGS/PC7/8"x7', MBS: 80000LBS, 23.21KGS/PC1"x7', MBS: 90000LBS, 29.29KGS/PC iron Log Boom Chain