1. Professional quality opaque chemical storage bottle. Keeps darkroom chemicals /Laboratory Potion/Photosensitive Material fresh by avoiding exposure to air and light.2. Made from chemical resistant HDPE plastic, which is excellent for long term storing mixed chemicals. HDPE is anti-corrosion, acid resistance.3. Fill chemicals in, bottles can be compressed until air wipe out, fulfill anti-oxidation and moisture proof.4. Different color caps with label, to mark and distinguish storage items.5. Compatibility: Suitable for all photographic chemicals including developer, stopper and fixer; laboratory potion and photosensitive material. Solid, powder, liquid can be stored.Max capacity: 1L / 1000ml.Dimension: Mouth 3cm/1.18 inch. Max streghth 16cm/6.3 inch, Min streghth 8cm/3.15 inch. Width 10cm/3.93 inch.Caps color will be sent randomly,Specified color is not accepted, caps color will not repeated.Colour:BlackMaterial:HOPEPackage Contents:3 x Darkroom potion bottle reservoirOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.