3 1/2" W X 2 1/4" T UNF SB ARM. 
Unfinished solid brass bent arm that measures: 
3 1/2" wide and 2 1/4" tall with 3/8" threads on each end. 
3/8" outside diameter (1/8 IPS). 
$2 minimum charge orders less than $20. 
$.50 packing charge for each parts box.