Image Item No. Description By  3678a  Slope 65 2 x 2 x 2 without Bottom Tube Catalog: Parts: Slope 2  3684a  Slope 75 2 x 2 x 3 - Hollow Studs Catalog: Parts: Slope 32  3685  Slope 75 2 x 2 x 3 Double Convex Catalog: Parts: Slope 719