The drop rates for the "five Customization Item Rocket League Items extraordinariness levels" are underneath, civility of Psyonix:
The odds of accepting a Painted or Certified ascribed things are 25%.
Psyonix further notes that these rates have been unaltered since the Crates and Keys framework initially showed up in September 2016, and these rates apply to www.lolga.com all cartons and case arrangement.