Universal 1/4 x 4 x 6 Aluminum Plates For pipe size 2.5" to 1.75"
You can use for H-frame for VHF/UHF antennas or like mast to element for Ygai Project. You can mount these plates even vertically for GP/Vertical project or like mast coupler 2.5" to 1,75".
Comes with 4 yellow zinc plated U-bolts and saddles. U-Bolts:This is professional grade series. This series provides high strength steel 5/16” U-bolt with a patented ribbed and notched 13 gauge double edge saddle and hex nuts. This unique clamp offers a lightweight alternative with outstanding strength and seal-ability. Mast Plates keep your Yagi stable and properly secured on the mast.
Picture shows 1,75 to 1.75
Looks similarly for dimensions of 2.5" to 1.75".