Mini Skater360 Degree Adjustable Drip Emitters Sprayer Irrigation Drippers Sprinklers Watering Drippers on Stake Fit for 1/4 Inch (4/7mm) Drip Irrigation Tubing (Black,25Pcs)

They are a little smaller than the ones I by at the hardware store. They fit standard tubing, and are well made.

Non standard size flange too big for 1/4" tubing.Edit: Tight fit and bigger than my other fittings but boiling water will stretch the tubing enough to make it just work.