Heavy Duty Black Coated Boss Head Clamp, up to 20mm Rods Item Type_Net 75 inches tall on a

75 inches tall on a 10 by 11 inch metal base

5 inches for benchtop and field magnification

the near-flat diverging curvature giving near-collimated virtual reflections for astronomical and parallel-beam analogue work

and 1g weights for use with balances and scales in teaching mass

Eight aluminum-shank tuning forks tuned to scientific pitch (C4 = 256Hz) and ranging from 5 9/16 to 7 1/8 inches

Heavy Duty Black Coated Boss Head Clamp, up to 20mm Rods Item Type_Net 75 inches tall on aHeavy duty die cast boss head with a black finish, 5 inches long, accepting rods up to 20 mm in diameter with grooved thumbscrews for secure right angle rod connections.