Coil Master 521 TabThe Coil Master 521 Mini V2 is a compact all in one coil building and testing device featuring ohm measurement, coil firing, and voltage testing functions. Designed for rebuildable vape users, it provides precise readings and safe coil testing in a portable setup. Compatible: 18650 Battery SpecificationsResistance Measuring Range: 0. 059. 9 (0. 05 error)Resistance Rate: 0. 1Connection: 510 spring loaded threaded pinBattery: 1 18650 (not included)Coil
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