Image Item No. Description  Mx1122L  Modulex, Brick 2 x 2 (Lego on studs) Catalog: Parts: Modulex, Brick  Mx2341  Modulex, Brick with Grooves 1 x 4 (horizontal profile brick) Catalog: Parts: Modulex, Brick  Mx2351  Modulex, Brick with Grooves 1 x 5 (horizontal profile brick) Catalog: Parts: Modulex, Brick  Mx2361  Modulex, Brick with Grooves 1 x 6 (horizontal profile brick) Catalog: Parts: Modulex, Brick  Mx2371  Modulex, Brick with Grooves 1 x 7 (horizontal profile brick) Catalog: Parts: Modulex, Brick