Hunter TC-Series Replacement Head, Red Replacement Head for Hunter TC Series models, Butler ELX and Ergolock Series Changers(Non-Leverless Only), Accuturn/Bosch 220S, 4225, 4230, 4335, 4465, 4540, 5210, 5320 models, Sicam 326, 520, 526, 530, 720, 726, Grifone 516, Colibri 512, Falco 3009 models.. Head has wider channel for better performance and heavier bracing in nose of head for reduced flex during demounting process. Most like OEM head on new machine.. Red color AE0343-R No -