Standard – 6319, 6340, 6341, 6344, 6339 Models are 120 volt and supplied with porcelain medium base socket. Clear glass diffusers only. Pipe 6390-1, 6394-1, 6395-1 sold separately. (Pipes and mounting accessories available) Model 6344 requires 3" O.D. post (model #6374 sold separately).