Sold in pairs. Weight equals the amount fo force needed to fully compress the fixed ErgoGrip handles. The new Cando resistance sequence on these ergonomic grips covers any needs from the earliest stages of rehabilitation after stroke (yellow) to advanced athletic training (black). The force equivalent doubles with each level. Work your way up! Comes in attractive retail package. SOLD IN PAIRS! Fast and Inexpensive shipping make this the perfect therapy gift.