Product Overview
Becker Orthopedic manufactures four sizes of the Dorsiflexion Assist ankle joint. Each is made from 303 stainless steel. All "A" size joints have a 3/8" bushing hole. All "C" size joints have a 5/16" bushing hole. Sold individually or in pairs.
(https://www.beckerorthopedic.com/Product/AnkleComponents/DorsiflexionAssist/3225)