Up for offerding is my used Hallman MBC with the optional remote mount cable . It has the ceramic ball . I bought this new and used it for about 7k miles . I only used the low pressure spring , never opened the other spring. It is missing the vacuume line that came with it but thats it . The sticker is tattered . It works very good and removed from my car when I started to tune with a EBC solinoid and I have to say this isvery accurate for a MBC. It works perfect . NO SCAMMERS!