DSLRKIT 5/8" Spigot stud Adapter with 1/4" & 3/8" Female screw This adapter can connect Light Umbrella Holder(A,B,C2 Type...) to 1 / 4 "-20 & 3/8" screw Tripod. Material: Aluminum Metal Adapter SIZE(mm): 15.37(diameter)x27.8(height) color : Silver Suitable for B type and C2 type Umbrella Holder Swivel Light Stand.