Catalog: Parts: Vehicle, Base: 52037: Color Images
Vehicle, Base 6 x 16 x 2/3 with 4 x 4 Recessed Center and 4 Holes
White
by randyf
Dark Bluish Gray
by randyf

Part Color Codes:

 Color  Code  By 
 White  6109956  1  milan3864 
 Dark Bluish Gray  4259901  1  SimplyBricks 
 Dark Bluish Gray  6249995  2  Hygrotus