https://www.mccoys.com/shop/p/3404217-052303-18/jandorf-60151-lamp-reducer-brass
60151 Lamp Reducer, Brass
Sku: 3404217-052303-18
$3.29
9 Available at
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Specialty Lighting Accessories:Jandorf 60151 Lamp Reducer
Connects nipples of different sizes.
Specifications
3/8 F x 1/8 F Thread
Material
Brass