CAD Model for Plastic Wiffle(r) Baseball, 9in circumferernce, 2.86 diameter, 25.5grams (.9ounce). Available in white or yellow configurations.
http://www.3dcontentcentral.com/part...catalogid=171#
I believe this ball is made of PVC, the mass is correct - but if you think the slot size should be different, please let me know. I dont have the actual ball.
Be certain to check both configurations if you want yellow and white. If you want to create a linear pattern of baseballs, use the sketch line I used in the slot cut as a reference in the assembly. This will save you time.
Baseball is available in all CAD file formats.
Marie