3 sizes available in 1/8IP slip (3/8" diameter) and 1 size 1/4IP slip (1/2" diameter)
Double seating rings seat both top and bottom
Unfinished brass
Turned Brass Double Seating Rings (i.e. seats both sides), Unfinished Brass, The listed size will be the dia. measurement inside of the lip where an item will seat. Item numbers 22555, 22556, 22557 have a center hole with a 3/8" inside diameter, and will slip over 1/8IP threaded pipe. Item 22558U has a center hole with a 1/2" inside diameter and will slip over 1/4IP threaded pipe.
Certain bulbs are not available for sale in California due to Title 20. California's Proposition 65 entitles California consumers to special warnings. Read more at Prop65.