IMPACTO hand exercizing aid. Ergonomically shaped resistive hand exerciser made of non-allergenic polymer. Latex free, non-allergenic. Sold as Individually. Helps prevent repetitive strain injuries (RSI) when doing continuous tasks for long periods Aids in rehabilitation of hand and finger injuries Helps rehabilitate and strenghten weakened or injured fingers, hands and wrist Hand and finger exercizing and stretching aid to alleviate fatigue Ideal for arthritic and injured hands Color coded density resistance: 1804: Extra Soft (orange) 1805: Soft (green) 1806: Medium (blue) 1807: Firm (plum) "This item ships directly from the manufacturer and only ships on Wednesdays, regardless of what shipping option is chosen. There are no exceptions. "