clone:
A Grade Clone.
You can find more information about the difference in cloned products here.

Skill RDA Specifications:
• Black Anodized Aluminum Top Cap
• 24mm RDA
• 24k Gold Plated 304 Stainless Steel Deck
• 4.5mm Deep Juice Wells
• 2 Post Design With 3mm Wide Vertical Slots
• Single & Dual Coil Air-Flow Control
• 6 x 24k Gold Plated Post Screws: 2 x Slot, 2 x Cross, 2 x Hex
• 24k Gold Plated Brass 510
• ULTEM Composite Drip Tip
• PEEK Insulators
• Serialized