According to Beckett (emphasis is mine):
"This 250-card set features borderless color action player images printed on 20 pt. stock with holographic foil stamping and was distributed in eight-card packs with a suggested retail price of $2.59. The backs carry information about the player and career statistics. The second series contained the subset "Team SkyBox" that was inserted into packs at a rate of one in four."
Buy 1997-98 SkyBox Premium Sports Cards Online | Basketball Card Value & Checklist - Beckett
When night comes creeping in,
Dark restless shades arise.
Prepare to crawl and run.
The Black is here tonight.