Tube adapters are used as components for modular lower limb prostheses. They connect the prosthetic foot to the proximal components. Adapter combinations allow for controlled angle and length adaptation in the sagittal and frontal plane as well as adjustment of inward and outward rotation
Hardness of pyramid section kept high to handle screw pressure. On the other hand, Hardness of the prongs has been reduced by heat treatment, it can therefore be bent back and forth.