Medacta provides a wide and complete range of femoral heads available in different diameters, sizes and materials. Stainless steel heads: ø 22, 28, 32 mm. CoCr heads: ø 22, 28, 32, 36 mm. MectaCer BIOLOX delta Ceramic heads: ø 28, 32, 36, 40 mm. MectaCer BIOLOX Option System: ø 28, 32, 36, 40 mm.