About our solder pastes, the differences and characteristics use: M9-lead-free silver-containing environmentally friendly high temperature solder paste 217° Tips for use: It is suitable for masters who have high requirements for maintenance quality and reduce repairs. But because of the high temperature, the maintenance difficulty will also increase. Features: High temperature 217°, silver content, fine and sticky, no bubbling of tin planting, uniform tin beads, firm welding, environmental protection. / M10-leaded medium temperature solder paste 183° Tips for use: It is suitable for regular mobile phone maintenance and reduces the need for repairs. Features: medium temperature 183°, fine and sticky, no bubbling of tin planting, and uniform tin beads. / M11-lead-free low temperature solder paste 138° Tips for use: It is suitable for mobile phone maintenance that cannot withstand high temperature (such as tin planting in the middle layer of iPhone X motherboard maintenance), reducing maintenance difficulty and risk. Features: low temperature of 138°, fine and sticky, no blistering of tin planting, uniform tin beads, reducing maintenance difficulty and risk, but the welding firmness is not as good as medium and high temperature. / M13-Medium temperature solder paste containing silver and lead 190° Tips for use: It is suitable for regular mobile phone maintenance and reduces the need for repairs. Features: medium temperature 190°, silver content, better firmness, conductivity, gloss, fine and sticky, no bubbling of tin planting, and uniform tin beads. Specifications: M10 / M9 / M13 / M11 Material: solder paste colour: yellow<br><br>Package Contents: 1 x Phone Microsoldering Repair Only 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.