Image Item No. Description By  2412  Tile, Modified 1 x 2 Grille (Undetermined Type) Catalog: Parts: Tile, Modified 16  2412b  Tile, Modified 1 x 2 Grille with Bottom Groove Catalog: Parts: Tile, Modified 38  2412a  Tile, Modified 1 x 2 Grille without Bottom Groove Catalog: Parts: Tile, Modified 13  35787  Tile, Modified 2 x 2 Triangular Catalog: Parts: Tile, Modified 1  33909  Tile, Modified 2 x 2 with Studs on Edge Catalog: Parts: Tile, Modified 1  6179  Tile, Modified 4 x 4 with Studs on Edge Catalog: Parts: Tile, Modified 76  6180  Tile, Modified 4 x 6 with Studs on Edges Catalog: Parts: Tile, Modified 67  6178  Tile, Modified 6 x 12 with Studs on Edges Catalog: Parts: Tile, Modified 71