Built-up handles give greater control to people who lack coordination, strength or gripping ability. Tubing has a slip-resistant "skin" and is dishwasher safe. Supplied in 12" (30 cm) pieces that can be cut to length. Bright Assorted (For visually impaired and pediatric use.) - Includes 2 bright yellow, 1/4" (.6 cm) I.D x 1" (2.5 cm) O.D.; 2 bright orange, 3/8" (.95 cm) I.D. x 1 1/8" (2.9 cm) O.D.; 2 bright blue .7" to .8" (1.8 to 2 cm) I.D. x 1 1/8" (2.9 cm) O.D.