Added several insulators to this ever growing collection since U last uploaded a pic on Nov. 11th. Click here to see difference [id=419593835]. In this pic the top and bottom selves are 030's. The second shelf on the right side also has six 030's but they have straighter skirts ariety. They match the five AT&T pieces shown to their right. All either have small 00 or X2 mold letters at the top of the dome. Next to the two 025's with eight blotouts (second shelf up to the left of the drip point piece) they seem to be much harder to find. The sharp drip point insulators on the second shelf up are 040's. Next to them on the right is the unlisted six blot out piece I recently discovered. So guess one would have to say out of all the blot out insulators it would be the toughest to find. I also noticed recently while that only numbers are listed at the top of the top of the domes. Don't know why those listngs don't include letters. Most 030's and 025's have either X1 ir X2 on the dome.