The Arrowhead Brass 355XLF series has a 3/4" Female Iron Pipe Thread x 3/4" Male Hose Thread- XL Flange and are made of lead-free brass and features an oversized 3-1/4" wide flange providing extra coverage for installations with larger holes where the tube extends from the wall or those requiring wider spread wall. 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.