Dear Bob and Colleagues, I've used Whatman PE SIL G plates very successfully (cat.# 4410221). I don't know that they are the best, but I do know they work very well. Kathleen Archer ****************************** Kathleen Archer Dept. Biology Trinity College Hartford, CT 06106 Ph: (860)297-2226 kathleen.archer at mail.trincoll.edu ******************************* ---