Image Item No. Description By  3688  Slope 75 2 x 2 x 2 Quadruple Convex Catalog: Parts: Slope 1  3684  Slope 75 2 x 2 x 3 (Undetermined Type) Catalog: Parts: Slope 4  3684a  Slope 75 2 x 2 x 3 - Hollow Studs Catalog: Parts: Slope 27  3684c  Slope 75 2 x 2 x 3 - Solid Studs Catalog: Parts: Slope 1593  3685  Slope 75 2 x 2 x 3 Double Convex Catalog: Parts: Slope 37