Weewooday Glass Droppers Pipettes Graduated Lab Dropper Glass Liquid Pipette with Big Rubber Hats 20 cm Stir Rod Washing Brush Transfer for Liquid Essential Oil(16 Pieces,Blue,5 Ml, 10 ml)

I think the manufacturer took previous negative reviews to heart. Glass appropriate thickness, measurements easy to read. The bulbs give the right resistance, easily detach for cleaning and easily reattach for use. Very well packed. Zero breakage.

These are great. they are a little bigger than I needed, but they are sturdy and have a graduated scale along the side so you know how much you are applying. I love that they are glass, and won't add unnecessary plastic to the environment when I'm dead and gone. They came with two brushes for easy cleaning. A solid, useful product.

I got these to use in my big bottles of Fragrance oils. They work perfectly. Grat suction, it measures perfect too. They reach to the very bottom of the tall bottles when they are almost empty which is what I needed these for. The glass is a nice thick sturdy glass. The bulbs seem to be made from a good rubber material s I think they will last awhile. My only concern was they arrived in a shipping bag that contained a thin box with all the components in it. This box was crushed upon arrival. I was afraid the glass parts would be broke but they were wrapped in a bubble wrap which I guess saved them or I was just lucky. Otherwise, the product itself is really great quality.

Work well, strong and robust. The graduations do not come off with mineral spirits or acetone. Best of all, the bulbs are actually large enough to suck up 10 mL of fluid. That said, the packaging is terrible and I am shocked that nothing was broken.

I was looking for a better way to get an accurate 10 ml water sample for my daily pool chlorine check because I found it difficult and too subjective with the graduated cylinder that came with my TFT Pro pool test kit.This works and is very accurate "but" you have to adjust the water meniscus twice - once at the top 10 ml mark when collecting the water sample and again at the bottom of the scale which is zero when discharging the water into the testing cylinder.There will be about 1 ml of water left in the tube so "DO NOT" squeeze the bulb and discharge all the water into your sample.I had no trouble installing the bulb on the tube and squeezing it to get the suction to draw the water into the tube was easy.I am not sure this will save me any time but it eliminates the uncertainty I previously felt when using the graduated cylinder alone.I am happy with my purchase.

I didn't realize how big these droppers are, so it's my mistake. I have not used them since they are so big, but they seem to be made with pretty good quality.

Very versatile as I needed various sizes for all sorts of chemical solutions. Good value for the money.

If you need to be precise with the ml (or ounces) dosing for liquids - then these will come in HANDY! I have used these to precisely measure out 12ml of liquid (vs. the 20+ that would accidentally come out (and spill due to the backflow)).The glass stirrers are useful for stirring liquid while being easy to keep clean (rather it is oily or non-oily). The brushes are nice, though they don't go all the way to the tip (which can be tricky to clean regardless)).The size of the droppers did take me back a bit. I wasn't sure what to expect for a dropper sized to extract up to 10ml of liquid at a time - but these are definitely not small and petite (despite how they appear in the picture).