New in Box and FIRST quality (NOT a second or blem) 16 lbs Track Inertia Bowling Ball Pin: 3-3.5" Top Weight: 2 1/2 Ozs. Condition is New and Undrilled The Track Clam Shell™ asymmetric core and polished Power Peak Particle™ coverstock join forces for greater length, massively angular backends and explosive knock-down power. Incredibly versatile, Inertia is the superior choice for medium to heavy oil.