With three concentric 1/2 and 3/4 trade size KOs for conduit connections.

Manuals & Documentation
Catalog Number AL5210B3
Manufacturer Legrand-Wiremold
Brand Legrand-Wiremold
Country of Origin United States
Made in USA Yes
RoHS URL http://www.ideadigitalcontent.com/files/11311/ROH_Legrand_ROHS_statement.pdf
UPC 786776046809
GTIN 00786776046809