Sherwin TAM Panel Sherwin Incorporated| 22626 Sherwin TAM Panel Print Sherwin Incorporated| 22626 Sherwin TAM Panel Sherwin TAM panels are made to test fluorescent water washable, post emulsifiable or post removable penetant liquid penetrant inspection processes. Made of stainless with 5 clear star patterns, Sherwin testing panels offer a polished type and a grit blasted type, both to Pratt & Whitney 146040 specifications. Half of the test surface is chrome plated and the other half is grit blasted to a medium roughness for washability and background tests. Options: 146040: Sherwin TAM panel (POLISHED) with storage case and certificate with measurements. 146040-2: Sherwin TAM panel (GRIT) with storage case and certificate with measurements. 146040-P: Sherwin TAM panel (POLISHED) with storage case, certificate with measurements and defect pictures. 146040-2P: Sherwin TAM panel (GRIT) with storage case, certificate with measurements and defect pictures. Request for information