Features: - brand new and high quality As a protective layer, it is applied to the circuit and substrate on which the printed circuit board does not need to be soldered, or used as a solder resist. Due to the special nature of the material, the solder mask oil will not dry naturally. UV curing is required. The purpose is to protect the formed line pattern for a long for time. This is a liquid photo solder resist, is an acrylicoligomer. With anti-welding, guard, insulation and other functions, prevent physical disconnection of conductor circuits. Specifications: Material: Glue Size: approx 7.3x4x4cm/2.87x1.57x1.57 inches Package Includes: 1x Solder Mask Green Oil note: 1.Please allow 1-3cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.