Screw-in slave flashes need this Smith-Victor ULM45 Umbrella and Light Mount . It features a standard Edison base thread socket with a 120 VAC power line, a swivel for light angle adjustment, a receiver to mount an umbrella, and a 5/8" diameter receiver for mounting it on a light stand. Besides a slave flash, the ULM-45 can be used for photofloods up to 500W.
UPC: 037733004807