Includes 20 pieces of access valve cores and 10 pieces of valve cores. Includes 10 pieces of R134a JRA High/Low import valve cores. Includes 5 pieces of R134a Domestic high flow valve cores M10. Includes 5 pieces R134a Domestic high flow valve cores M8. Includes 1 R12/R134a valve core remover/installer This kit consists of replacement valve cores for valve core removers and installers.