This set of TPHD fasteners is made out of stainless steel and includes 8 hex head bolts 3/8-16 X 1.250 L. Inch, 8 flat washers 3/8 Inch I.D. X 7/8 Inch O.D. and 8 lock washers 3/8 Inch I.D. The bolt kit for exhaust cab brackets fits Peterbilt 357 1987 thru 2007, Peterbilt 359 1967 thru 1987, Peterbilt 375 1989 thru 1995, Peterbilt 377 1988 thru 2004, Peterbilt 378 1988 thru 2007, Peterbilt 379 1987 thru 2007, Peterbilt 385 2000 thru 2007, Peterbilt 386 2006 thru 2010, Peterbilt 388 2008 thru 2010, Peterbilt 389 2008 thru 2010 & Peterbilt 389 Glider 2008 thru current trucks. Sold Individually.