Slope, Inverted 45 2 x 2 with Flat Bottom Pin : Part 3660 | BrickLink
LEGO part 3660 - White Slope, Inverted 45 2 x 2 at BrickScout
Slope, Inverted 45 2 x 2 with Flat Bottom Pin with Green Computer Screen on White Background, Red, Green, and Yellow Buttons on Right Side Pattern : Part 3660p01 | BrickLink
Amazon.com: LEGO Parts and Pieces: Blue (Bright Blue) 2x2 45 Inverted Slope x100 : Toys & Games
Amazon.com: LEGO Parts and Pieces: Black 2x2 45 Inverted Slope x100 : Toys & Games
LEGO PART 3660 Slope Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] | Rebrickable - Build with LEGO
Amazon.com: LEGO Parts and Pieces: Red (Bright Red) 2x2 45 Inverted Slope x20 : Toys & Games