RubberMill’s chemically blown sponge balls are molded from a premium grade natural rubber compound. Our molding process ensures uniform cell structure, excellent physical properties, good colorability, and smooth skinned surfaces.

Typical Uses for Sponge Rubber Balls:

Exercise equipment, medical apparatus, toys, flotation and novelty.

Standard Balls:

Properties
Material: Natural Rubber
Hardness: 70 +/– 5 (Shore00)
Tolerance: +/– .040 in.
Density: 25.0 lb/cu.ft.
Rebound: 40%
Tensile Strength: 140 psi
Elongation: 480%

Sizes (diameter)
Nominal (in.) Actual (mm)
1 1/8 28
1 3/8 35
2 50
2 1/4 56
2 1/2 63
2 3/4 70

Standard colors available are red, blue, white, green, and yellow*. Other sizes, compounds, and colors are available as custom orders. Contact a RubberMill Customer Service Representative for more information. Visit our Design Illustration #46 Ball to specify your ball needs.