This pair of brake calipers are a great fit for your Nissan Sentra, Altima, and Maxima as well as your Infiniti I30. They come with mounting hardware and have a piston diameter of 57 mm. The brake calipers feature a floating caliper type with a metal piston. The inlet thread diameter is M10 x 1.0 and the bleeder thread diameter is M10 x 1.0. The brake calipers and brackets have a rust preventative finish and include one piston. They are manufactured in China and are not universal fitment. Exact item set is shown. New open box without original packaging. Includes caliper brackets and the hardware shown. Made in China. No returns on installed items or partial sets. This item is a new, opened customer return. It has been inspected and passed quality control to insure the condition described and contents are accurate. Please review actual photos as stock photos are not the actual item, our photos are. You will ONLY receive exactly what is shown in photos, regardless of what might have originally been included. Fits: 1996-1999 Infinit I30 1989-1999 810/Maxima 1993-2001 Altima 2000-2006 Sentra