Fine thread: Adapting even threads, which have perfect size and will not slid, making it easy and stable to install. High quality: Made of high strength stainless steel steel material, strong, rustproof, wear-resistant, have long using life span. Usage: The screw bolts are used to fixing the exhaust manifold on engine cylinder or cylinder lid, and make it connected with the exhaust pipe. Lightweight: Compact and lightweight, easy to put into toolkit or store in boxes. Applicable models: suitable for Ford F250 F350 diesel engine 1994-2003 engine Weight: about 75g Colour: Black Material: iron Quantity: 1set Packing list: 1 set with 16 bolts Only the above package contents are included, other products are not included. Note: The reflection of light and different monitors may cause the color of the item to be slightly different from the actual item. Measurements allow +/- 1-3cm."