These 90 deg male instant fittings can be used to connect our 1/4" hose to 1/8"npt female fitting used on many of our products. We can not guarantee these working with other hose other than our own. We stock these in 2 sizes 1/8"npt fitting, and 3/8"npt fitting other sizes can be special ordered plz email us. Devilsown instant fittings install easily on the hose without the need for clamps or ferrules--just push hose into the fitting. So easy, it can be done with one hand. You can also easily remove the tubing, just by pressing the release portion of the fitting while pulling the tubing. So these are completely reusable. They are completely compatible with methanol and will not rot from the inside out. The NPT threads come with TFE already applied, for a water tight seal. We stock many other sizes not show contact us for more info.