'KERBOULL’ type reinforcement cross Stainless steel, 5 sizes available : interior diameters 50-54 -58 -62 -66 This product is recommended for acetabular reconstructions. Suggested technique : 1- Position and impaction of bone graft. 2- Position the cup and place the stainless steel screws, diameter from 4.5 to 6mm. 3- Cementing the cup. The PE spacers guarantee a regular cement mantle, and eliminate the risk of corrosion by avoiding contact between the cross and the cup should a metalback cup be used.