EISCO Premium Graduated Cylinder Set - 50mL, 100mL & 250mL - ASTM, Class A - Protective Collars, Hexagonal Base - Blue Graduations - Borosilicate 3.3 Glass

Great quality for the price! Now I can cook meth just like the pros!

Haven't used but perfect for lab experiments

Excellent product, though fragile if tipped over or dropped. The best way to remove alcohol from gasoline is to add an amount of water equal to the alcohol content. Gasoline and alcohol don't mix very well, but water and alcohol just love each other, so when water is added to 10% gasoline (10% ethanol blend), it bonds with the water molecules, and due to its heavier weight, drops to the bottom of the container, forming a distinct line of separation between the water/alcohol blend and the now pure gasoline. So to make sure you get all of the alcohol out of the gasoline you have to make sure you are adding enough water to equal or better the volume of the alcohol. Putting 100ml of 10% gasoline in a test tube, and then adding 20ml more water will cause the contents of the tube to rise to the 120ml line. After 30 or 40 minutes of being undisturbed, you can see the amount of alcohol by looking at where the line of separation is. It is very easy to see. If it is sitting at the 31ml line, then alcohol makes up 11% of the gasoline volume.

The product is great. Works well in our pharmacy Easy to use and read the measurements

Came very securely packed which is always nice for glass. They don't feel overly thin or fragile. They are easy to work with and pour very well. I was able to precisely measure solvents to make adhesives that turned out very well. Markings seem accurate. No problems cleaning or drying them. The slides for marking measurements are easy to move but stay secure in their spot. Not sure if the paint will hold up long term if you keep sliding them. Overall they've worked great for me.

Work great

High quality, accurate measurements. Well made glass. The yellow "ring markers" to establish your desired measurement to make it easier to read the vial are clever how ever they are impractical for anyone who needs to take dynamic measurements, not a static one. I recommend getting these for their various uses. I use these for nutrients and they are levels ahead of whats offered within the industry. Couple these with some of the disposable pet syringes for very accurate measurements and for ease.

This set of cylinders is the genuine article for actual chemical work. They are good quality and accurate. The markings make them easy to read and the liquid meniscus sits cleanly in the center of the cylinder for accurate measures. The protective collar keeps the mouth of the cylinder from breaking in the event they are knocked over, but the collar also comes in handy as a marker for your measurement if you are scatter-brained like I am (Just don't forget to reset the collar back upward afterward so they can protect them from breaking). The set was shipped in good packaging, so they arrived in perfect shape. Unlike plastic cylinders, these will not scratch after repeated uses or cleanings with a bottle brush, and they will not be affected by high-concentration caustics or acids. Be sure to follow proper safety protocols when using these (protective gloves and safety glasses; a respirator or fume hood, if applicable). The three different sizes of cylinder make it easy to select the correct one for whatever measure you happen to need, and the different diameter mouths assist with making the best choice for easy pouring, whether that means a flanged reagent bottle, a beaker, or a pipette or dropper. While not the cheapest option out there, these are high-quality graduates that should last as long as I need them.

Laboratory grade. Good item when this level of accuracy is required. Meets our needs.

El empaque donde venían los productos fue hecho a la medida de las probetas, por lo que no daba espacio a que se movieran o desplazaran durante el trayecto de entrega. La entrega fue rápida. El producto está muy bien elaborado, la presentación no le pide nada a marcas más reconocidas de cristalería, y para ser escala A el precio es muy económico. Definitivamente las volvería a comprar.