The spring cup is a finishing touch when it comes to a complete shock build for spring concentricity. The JConcepts spring cups are a 5mm off-set which is the most popular setting on the B5M |T5M and SC5M. The aluminum material in either blue or black anodizing provides a healthy footing for the hot new spring of choice or the trusty stock AE spring set. The cups feature a unique shock shaft path which helps lock the spring cup in position during hard crashes or collisions. Etched with off-set identification and JConcepts.net logo the new spring cups are top notch replacements.