There are six plastic paddles, three plus and three minus, in this set. The lenses on the Retinoscopy Rack come in the following sizes: 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 6.0, 7.0, 8.0, 9.0, 10. Large aperture retinoscopy rack set lenses are 25mm in diameter and almost 50% larger than other retinoscopy instruments sold by Gulden.
All glass lenses are recessed to help prevent scratching. Includes wooden storage case with felt interior. Each stick is approximately 11 inches (27 cm) long and 1.375 inches (34mm) wide.