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STRUCTURE8 <br />DOUBLE 4" <br />Traditional Lap <br />R-Value: 2.5 <br />DOUBLE 4-1/2" <br />Dutch Lap <br />R-Value: 2.9 <br />SINGLE 7" <br />Traditional Lap <br />R-Value: 2.7 <br />DOUBLE 6" & <br />DOUBLE 6" LONG LENGTH <br />Traditional Lap <br />R-Value: 3.0 <br />STRUCTURE <br />PROFILES <br />D4 DL4.5S7D6 & D6L