The Arrowhead Brass 255XLF series has a 1/2 inch female iron pipe thread male hose thread xl flange. Feature an oversized wide flange providing extra coverage for installations with larger holes where the tube extends from the wall, or those requiring wider spread wall mounting locations where previous screw-mounts have deteriorated. The 255XLF features our exclusive one-piece O-ring bonnet stem design for easy operation and years of service with fewer parts to maintain, repair, or replace.