"Ergonomically Correct Rubber Bands Alliance Sterling's soft stretch helps to avoid Carpal Tunnel Syndrome. 285-300 psi elasticity. 700% elongation. 13-lb. breaking strength (based on 1/8"" wide bands). Size 64 3-1/2""l x 1/4""w x 1/32 gauge (thickness). 440 Bands 1-lb. Box"
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