TWO RESISTANCE LEVELS FOR CUSTOMIZED TRAINING: Red (10lb) and Green (15lb) bars each measure 12" long and vary in diameter for progression; made from durable dry natural rubber for consistent performance across therapy stages IMPROVE GRIP & ARM STRENGTH: Designed to strengthen hands, wrists, and forearms while helping relieve discomfort from conditions like tennis or golfers elbow and tendonitis, the THERABAND FlexBar is widely used in rehab, sports training, and occupational therapy SIMPLE, PORTABLE THERAPY TOOL: Lightweight and travel-friendly, use the FlexBar at home, work, or the gym to support daily rehab routines or boost athletic performance; no batteries or setup required USED BY PHYSICAL THERAPISTS: The Tyler Twist with the FlexBar is clinically researched and proven to reduce elbow discomfort by 81% and increase strength in the tendons by 72% in tennis elbow patients; trusted by professionals and athletes for improving grip and arm mobility, the FlexB