| Description | These individual prisms are mounted on a stick to make presentation easier and more sanitary. Prisms are 37 mm square. They are available in increments from 1/2 to 50PD. Plus red square. Now shipping only stainless steel shafts. 4457 xx prism on | 16 segment Horizontal Prism bar provides 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45 PD. 4446 xx Horizontal Prism Bar. | 15 segment Vertical Prism Bar provides 1, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 25, 30 PD (Note: 30 PD is on the bar). 4447 xx Vertical Prism Bar. |