This is a 10cc syringe of Felder EL-5510 type 4 solder paste. It is compatible with Cirqoid dispensing add-on and is good for both 0.25mm and 0.40mm dispensing needles.
Please note that solder paste is sensitive to storage and transport conditions. Ideally, it needs to be stored in a vertical position in a fridge at 5-15ºC. While in transit the paste can be subjected to unfavorable environmental conditions which can result in deterioration of the quality, sometimes to the point of being unusable. We encourage you to first try sourcing the paste locally. By ordering the paste you accept the possibility of it being damaged in transit.