Check the listing for details. Predator 212 High Performance Racing 5mm Valve Spring Retainers & Locks New USA. Condition: New. Listed at 12.95 USD. Predator 212 High Performance Racing 5mm Valve Spring Retainers & Locks New USA Predator Harbor Freight 212cc 5mm Racing Valve Spring Retainers and Locks New USA 99% of my items ship in less than 24hrs! These are what is used/prefered in most performance applications where the 5mm valve stem is used. You get exactly what is pictured 2 retainers that will work with up to 36lb valve springs and the 4pc of the positive retainer locks. (this will do one head intake and exhaust) We use these in all of our racing engines and have never had a valve train failure I will pack them well and ship them fast with Tracking USPS 1st Class 48 states ONLY for a flat $3.80 buy a second set and they ship for 1 cent! (we only charge for the EBAY required tracking) Please check out my other products and parts for your performance and racing needs.. we don't just sell these we race them... Support-A-Racer