This kit allows TXV replacement on all 4 ton RCFA/RCSA indoor coils regardless of original TXV manufacturer. This kit also allows conversion from R-410A to R-22 of 4 ton RCFL/RCSL indoor coils with AC, AU or BC suffix. For RCFL/RCSL coils with CU or CC suffix, use 611065. This part has been replaced by RXCT-EBC.