The core should have {HEAD ~ a diameter} of 1.500 inches or less and an intermediate layer having {TAIL ~ a thickness} of 0.090 inches or greater 
The core should have { HEAD ~ a diameter } of 1.500 inches or less and an intermediate layer having { TAIL ~ a thickness } of 0.090 inches or greater
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH