You Are Looking at a Set of Front Brake Pads and Rear Brake Shoes
 
Includes:

1 X PART # CD830 , Front Premium Quality Ceramic Pads 
1 X PART # BS631 , Rear Premium Quality Organic SHOES
1 X PART # 17328 , Rear Combi spring kit , both sides rear

FITS:

2000 2001 2002 2003 2004 Nissan Xterra 2 & 4 Wheel Drive
2003 2004 Nissan Frontier 4x4 / 4 Wheel Drive