The PTO‑11ECO is a tube clamp adapter designed for prosthetic limbs, crafted from carbon steel with an approximate weight of 100 g. It securely clamps onto 30 mm tubular pylons (used in both above‑ and below‑knee prostheses) and features four adjustable M8×12 screws (zinc‑plated) that allow precise alignment in multiple planes. This export‑quality adapter supports users up to around 100 kg, offering a durable yet adaptable interface between the lamination socket and structural tubing.