50pcs Adjustable Irrigation Drippers, Drip Emitters Perfect for 4/7mm Tube PE Pipe, Adjustable 360 Degree Water Flow Drip Irrigation System for Flower beds, Vegetable Gardens, Herbs Gardens.

Lots of complaints about difficult to install and inconsistent flow rates. Well, they tell you to heat the tubing ends in boiling water (or use a Bic lighter) to soften it and then they slide right on and are never coming off. As to inconsistent flow rates - duh, they are adjustable through a broad range of flow and so some adjusting is necessary if you want every one to flow exactly the same. People are their own worst enemy when it comes to reading and following instructions as these are a very good product and as inexpensive as you could want compared to buying locally and getting the same product for five times the price.

These drippers are EXACTLY as you can seen in the picture. They DO NOT have the main distribution spike either attached or included! That is to say, these drippers are not intended to be used for INITIAL installation. They are replacement ends and WELL MADE at that. Thus, they are FIVE STAR, in their category. Some purchasers may be disappointed because they did not view the illustration carefulluy and expected to get attached feed spikes. Well, too bad. You get what you order and as you can see in the illustration, these drippers are sturdy and work admirably well as replacements for drippers that have been chewed, stepped on, or clogged beyond serviceable restoration. At this price and quality, this package of drippers is truly a find; and frankly, for me anyway, the 'twist-off' spikes are a waste and the softer plastic and casting process that facilitates such an 'all-in-one' device results in an inferior grade of product. If you want feed spikes, buy only what you need.

In the past I have always bought the Rainbird 6" stake emmiters. At the start of the season I was down to half a dozen so I went to order more - and was shocked at the price - 9.28 for FOUR! I decided to try some lower priced options and bought these instead. I was pleasantly surprised and disappointed when they arrived. They did not come with the coupler that the RB brand does so you have to buy a 50 pack of double ended hose barbs. The best thing about these is that the adjusting cap on top has about 50% more threads than the RB and it is easier to adjust. The one bad thing about these is that the fitting that you slip the hose on is quite a bit larger than the fitting on the Rainbird. It is extremely difficult to push the hose onto these fittings; I'm not sure if it can be done. What I do is take my Dewalt 20 volt cordless heat gun and heat the end of the hose for with it for about 10 seconds and it slips right on and doesn't leak. That works on new hoses but not on hoses that have been outside in use for a few years. Now I will have to see how these hold up over the years and if the plug up more or less than the Rainbirds.

This is not a fan spray pattern emitter so if you are looking for that there are many to choose from but if this is the pattern you are looking for these are a great value for the money. I also have some fan sprayers and for most applications I prefer these but when I am seeking a broader spray pattern with a greater diameter I use fan emitters. These are adjustable so you can turn the output up or down by twisting the top to fit your application. I connected these to 1/4 inch tubing and they fit perfectly. I find it does help to use a small torch to heat the end of the tubing a bit to get them to slip on more easily, you could also use a lighter or heat gun for the same effect, you just want to warm it a bit, not melt it. I have yet to find a dud in the pack, I have better luck with these than I do with the fan emitters in this regard.

Excellent value. The stake is 1" shorter than Raindrip units, but otherwise is as good or better quality. Requires a bit of effort to mount onto hose tubing—lubricant or hot water helps—but the fit is good and functions well.

The caliber is a little too large，It's very difficult to install，and a few of them, even if the flow is set to a minimum, still yield a lot of water.

The adjustable spray pattern is much more effective for small bushes and clusters of flowers/vegetables etc. than the traditional drip-ends. For the price and quantity, these spray drippers are great deal.

Quite a few, around 10%, of mine have broken after a year of use. Generally the break occurs where the barb attaches to the dripper body. I specifically have not forced the lines onto the barbs, and instead heated them so they go on easily. I think it's just in the nature of somewhat fragile items like this. In terms of functionality, these do what they're intended to. They adjust down to essentially zero flow, and at full on, can produce a small fountain with sufficient pressure. With the cap off, they produce a vertical stream. The caps seem to eventually rotate off on another approximately 10% of them, but that's harmless compared to cracking at the barb / body area. I ended up ordering more simply to have more on hand. They're not a ripoff on the piece price, so tossing out a few is not a big deal, so long as you have a convenient heat source for affixing the line to the new emitter.

There were two different styles of nozzles in the package, which makes it difficult to set uniformly for all plants. I have installed about half of them and found one to be defective, spraying water out of the base. They are okay but certainly not to be compared to Rainbird for quality.