- Cover
- ECA-XR Pearl
- Factory finish
- 500 Siaair, Compound
- Color
- Ultramarine
- Core (15 lb)
- Quantum Mushroom
- R.G. / Differential / Bias
16 lb 2.522 0.052 0.013 15 lb 2.563 0.052 0.013 14 lb 2.642 0.044 0.010 - Release date
- March 5, 2019
- Balls with the same cover
- This is the only ball in the Bowlidex with the ECA-XR Pearl cover.
- Balls with the same core
- These balls have the same 15-lb Quantum Mushroom core as the Quantum Bias Pearl:
- From the manufacturer
Our ECA-XR Pearl coverstock combined with the Quantum Mushroom High RG Asymmetric core gives strong hooking motion with excellent pin carry on medium lane conditions.
| Name | Cover | Released | |
 | Quantum Bias Solid Brunswick | ECA-XR Solid | Aug 7, 2018 |