Boom Racing #LTDBBZ High Performance Full Ball Bearings Set Rubber Sealed (14 Total) - for Redcat Lightning EPX Drift Lightweight upgrade instantly enhances overall performance in handling and durability Fits Perfectly. 8x Diameter( Inter): 10mm Diameter (Outer): 15mm Thickness:4mm 6x Diameter( Inter): 5mm Diameter (Outer): 10mm Thickness:4mm Takes 7 to 15 business days by standard airmail shipping. 80% of packages arrive within 10 business days. Most packages ship within 12 hours. Please allow 1 extra day if order is placed during the weekend. Expediated shipping is shipped by DHL or Fedex. Arrives in about than 2-5 days. Major cities will receive orders earlier.