4CW and 4CCW GemFan Flash 5152-2 (5.1 x 5.2) Two Blade. Black GemFan Flash 5152-2 (5.1 x 5.2) Two Blade. Black Material: Plastic Composite Hubs: 5mm, Shape: FLASH Includes: 4 CW Black and 4 CCW Black Authorized GemFan Retailer. Direct from Factory.