I have once again been able to put together an entire set of Kerr insulators to offer here. Included are CDs 122, 128, 129, 155 and 203. The CD 122 error embossed No. 22 is included as well as the CD 155 KPP Armstrong. It's not often you have a chance to add an entire manufacturers line to your collection in one shot. $30 postpaid, considerably less if you pick them up from me at Perkiomenville, PA. All are in mint condition.