Built-up handles give greater control to people who lack coordination, strength or gripping ability. These foam tubes provide an easy, convenient way to build up handles for an improved grip. Larger, softer handles offer greater control. Tubing has a slip-resistant "skin" that does not absorb water. Supplied in 12" (30 cm) pieces that can be cut to length. Assorted color tubing includes 2 pieces each: tan, red and blue. Each tan tube has a 1/4" (0.6 cm) inner diameter, 1" (2.5 cm) outer diameter and 5/16" (0.8 cm) wall thickness. Each red tube has a 3/8" (0.95 cm) inner diameter, 1 1/8" (2.9 cm) outer diameter and 3/8" (0.95 cm) wall thickness. Each blue tube has a 5/8" (2 cm) inner diameter, 1 1/8" (2.9 cm) outer diameter and 1/4" (0.6 cm) wall thickness.