Contains six different sizes including:

 4 different sizes Round Style Head Stainless Steel Capped Bumper Bolts:

5/16-18 x 1" with 3/4" Head diameter,

3/8-16 x 1 1/4" with 7/8" Head diameter,

7/16-14 x 1 1/2" with 29/32" Head diameter

1/2-13 x 1 1/2" with 1 3/32" Head.
Also includes 2 different size Pan Head Stainless Steel Capped Bumper Bolts:

3/8-16 x 1" with 7/8" Head diameter

8-1.25mm with 12.7mm Head diameter.
Arrives organized in an 11" x 6 3/4" Polypropylene Box.