Catalog: Parts: Technic, Brick: 18975: Color Images
Technic, Brick 2 x 4 x 1 1/3 with Pin Holes and 2 x 2 Cutout
Light Bluish Gray
by M_R
Dark Bluish Gray
by jennnifer

Part Color Codes:

 Color  Code  By 
 Light Bluish Gray  6226875  1  StormChaser 
 Dark Bluish Gray  6105731  1  randyf 
 Dark Bluish Gray  6150297  2  StormChaser