Repair kit for GAST units that take the K479 kit for Gast vacuum and pressure pumps. Fits Gast models 0823-101Q, 0823-V103, 1023-101Q, 1023-703Q and 1023-V103. will working in all dry running Gast models that are 1023,0823 in 23 series. the 23 series are units that take a caron vane not a