noodlejester
900 global ranks their covers from weakest to strongest going from S10-S90.. the S30 link is a weaker covered ball with a L-shaped core in it(for drier lanes).. the S30 link "I think" is a solid, don't quote me on it though alot of the newer balls(all brands) have some mica or pearl in them now/just not alot.. if you are interested I have a used S30 link with only 9 games on it.. drop me an email with a shipping address and I can give you a quote for a price if you like.. slashrr69