I went out to the flea market yesterday morning because i knew the sellers would be out seeing since it was going to be a 80 degree + day so i took advantage of it. while browsing the tables i found these insulators marked at a buck so i said 4 42s and a 164 sounds like a bargain to me so i bought em. the 42s need some cleaning, but the 164 is clean. the guy said he had just put it in an acid bath before he sold it to me.