Technic Circular Saw Blade 9 x 9 with Pin Hole and Teeth in Same Direction with Wheel Spokes and Hub Pattern on Both Sides (Stickers) - Set 70642 : Part 61403pb04 | BrickLink
LEGO part 61403 - Trans-Light Blue Technic Circular Saw Blade 9 x 9 with Pin Hole at BrickScout