"MASTER SET,5TH STAGE COMPRESSOR SHROUD; USED TO ZERO OUT THE PWA71775 GAGE WHICH MEASURES THE INNER DIAMETER OF FELTMETAL; CONSISTS OF STEEL TUBING W/ AN ANVIL STOP AT ONE END, AND A AN ADJUSTABLE BLOCK CONNECTED TO AN ANVIL STOP AT THE OTHER END; 3.600H X 22.514L IN BASIC DIA"