The reasons can be varied and can be multiple and include: color, engraving gone wrong, labeling done wrong, surface skuffs/dings, pin distances less then 1" from Pin to CG and pin distance greater then 5.5" from Pin to CG.
[115D] New NIB Hammer Hazmat Solid Bowling Ball | 1st Quality 14lb
[092M] New NIB Hammer Hazmat Solid Bowling Ball | 1st Quality 15lb
[158A] New NIB Hammer Hazmat Solid Bowling Ball | 1st Quality 14lb
New NIB Roto Magic Gem Bowling Ball | 1st Quality (14lb/15lb/16lb)