Image Item No. Description By  4460b  Slope 75 2 x 1 x 3 - Hollow Stud Catalog: Parts: Slope 20  4460a  Slope 75 2 x 1 x 3 - Open Stud Catalog: Parts: Slope 6  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 3  3684a  Slope 75 2 x 2 x 3 - Hollow Studs Catalog: Parts: Slope 1  3684c  Slope 75 2 x 2 x 3 - Solid Studs Catalog: Parts: Slope 3  3685  Slope 75 2 x 2 x 3 Double Convex Catalog: Parts: Slope 4