For youth, particularly, but for anyone wanting to learn proper technique requires starting with really light-weight equipment. It is best to learn without fighting just to hold the string back. These 10# limbs allow you to practice drawing and to shoot without the strain of heavy draw weight.
The limbs are wood/glass and fit the Rolan and similar risers (any riser that accepts Samick bolt-on limbs).
There are 3 lengths on the standard 23” and 25” risers: 62”, 64” and 66”. The length depends on the riser/limb length combination. Certain combinations also allow for 2# lighter or heavier weight.