what does the storm "product Line" mean ?

[eugene02]

i'm trying to practice to get as more rev as possible.. because I think my rev rate is too low now.. hee.. but.. i'll try.. slowly.. been bowling for roughly 2mths with my own ball..

[chrono00]

if i remember right. each line uses the same core, but they change other things like coverstock/polish and stuff. everything premier uses the shape lock core, hot uses the N.O.S. core ect