Pipe joint diameter is 19mm/0.74”, Standard 3/4" is about 19.1mm, Our product is a little smaller than stand size which make it easy to insert or pull out 3/4” hose.with the stainless tightening clamp you can make it tightly as you want.Heavy-duty brass construction with rust proof | Standard 3/4" US thread garden hose connection, work with your gaden hose, sprayers, nozzle, etc. | It can be use garden hose mender, end hoses male mender, end hoses female mender,hose repair mender. | 3 Male Mender + 3 Female Mender + 6pcs stainless tightening clamp fit for 14-27mm out diameter hose.stainless clamp width is 12mm. | If you have any problem with this product,feel free to email or call us.We will replace it or give your money back for any reason.