Be lazy like me - In BULK!
Here we have a deal on 50 multi-threaded coils. Each pre-made coil comes with 3 pieces of silica wrapped in resistance wire.
Each coil meters out to about 1.8ohms. I bought their last set of 10 and they were very accurate.
Great for all your RBA and RDA needs.
BONUS: FREE WORLD WIDE SHIPPING