Patent ID: 7810762

Claim:
An insulator for insertion into an opening in a building member around a tube, said insulator comprising: a) a plurality of sections hingedly interconnected along generally parallel fold lines, one of said sections comprising a center section and at least two of said sections comprising outer sections positioned on opposites sides of said center section and having a first side configured for engagement with a first tube of a first diameter and a second side configured for engagement with a second tube of a second diameter larger than the first diameter, said center section and each of said outer sections each including a respective leading edge transverse to said fold lines for first insertion into the opening in the building member and an opposite trailing edge, at least one of said trailing edges having an outwardly extending stop tab formed thereon and wherein there are no said stop tabs on any of said leading edges; wherein: b) said outer sections can be folded into either a first position relative to said center section with said first sides thereof facing toward one another or a second position relative to said center section with said second sides thereof facing toward one another, in said first position said first sides at least partially defining an opening sized to receive the first tube and in said second position said second sides at least partially defining an opening sized to receive the second tube; and c) said insulator can be inserted into an opening in a building member around the first tube with said outer sections in said first position or around the second tube with said outer sections in said second position, such that said outer sections cooperate with said center section to engage the building member and to substantially surround the respective tube and thereby isolate the tube from the building member.