Image Item No. Description  60593  Window 1 x 2 x 3 Flat Front Catalog: Parts: Window  4035  Window 1 x 2 x 3 Train Catalog: Parts: Window  51239  Window 1 x 3 x 3 Flat Front Catalog: Parts: Window  6556  Window 1 x 4 x 3 Train - 2 Hollow Studs and 2 Solid Studs Catalog: Parts: Window  60598  Window 2 x 4 x 3 - Hollow Studs Catalog: Parts: Window