16 ga, round hole
Ductmate’s DC3B Corner has a round hole and no outside flange because it’s designed to be used in conjunction with two corner clips (included). 250 per box
Item Codes:
DM35C #D3BGA DC3B Corner 16 Ga., Round Hole, W/Clip 250/Box [Package Weight: 43 lbs / box]
DMCLIP DCLPGA Metal Clip for DC3B Corner 500/Box
DMAL35C D3BAZ DC3BA Aluminized Corner W/Clip 250/Box (Blue)