Genuine Unistrut P1834-EG Channel Trolley Track Intermediate Support Hanger Bracket for All 1-5/8" Strut Channel Genuine UNISTRUT Brand Channel Trolley Track Intermediate Support Hanger Requires 3/8" x 2-1/2" Bolt and 3/8" Nut - NOT Included For use with: All 1-5/8" Series Strut Channels Silver Finish: Electro-Galvanized Zinc; ASTM B633, Type III