The Exotek +0 Aluminum B6/B5/B44.3 Spring Cup Set is a machined, polished and anodized aluminum +0mm off set spring perch set for Associated 12MM big bore shocks with B6 shock ends. Extra milling creates a lightweight design with the reinforced strength of cnc cut aluminum. Plus the snug fit reduces the chances of losing a perch. Milled holes also help reduce debris from collecting inside. Available in a blue or black anodized finish.