[DETAIL]<br>Features:<br>100% new and high quality<br>Features: No need to power on, you can quickly distinguish the material grades of nickel steel according to the redness time<br>In winter, the temperature is too low. Before testing, use a lighter to heat the surface for 3-6 seconds.<br>Put a drop of this identification on the steel surface, observe the time when the color turns red, and confirm the steel grade (model). The faster it turns red, the worse the material!<br>200 (ordinary 201): red within 5 seconds, and red within 30 seconds is 200,200 materials are also good or bad; manganese exceeds the standard<br>201 (Authentic 201): turns red in about 50 seconds; manganese exceeds the standard<br>202: red in about 1 minute; manganese exceeds standard<br>301: Red in 2-3 minutes, the color is very pale, please look carefully; new national standard food grade steel<br>304: It doesn't change red within 3 minutes, at most the bottom color becomes darker; old national standard food grade (older is better !!!)<br>Capacity: 12ml<br>package includes:<br>1pcs x steel testing fluid<br>hello, guys, thank you for visiting my store.We guarantee the quality of our products.Welcome to visit.Hope you have a nice day!<br><br>[ATTRIBUTES]<br>- High-concerned chemical: None<br>- Material: Rubber<br>- Type: Other<br>- High-concerned chemical: None<br>- Material: Rubber<br>- Type: Other<br>- Origin: Mainland China