What is the difference between the different SRA numbers? For example this one says SRA# 312 and another is SRA #99-20 and there are even more.

Flux normally comes in three different strengths, light (no-clean), normal (RMA), and strong (Water Soluble). #312 appears to be the weakest one and probably best for light work on sensitive materials. #90-20 appears to be the medium strength and probably the best for general all around use. #80 "This is a high activity halide, Neutral organic acid (OA) flux formulated for difficult-to-solder surfaces where activated rosin fluxes and less active OA fluxes cannot be used." (and probably not needed except for extreme situations).References: http://sra-solder.com/sra-312-no-clean-flux-pen-refillable/http://sra-solder.com/sra-99-20-rma-rosin-flux-pen-refillable/http://sra-solder.com/sra-80-water-soluble-flux-pen-refillable/

What do you use to refill with, how, what brand, etc...? I want to try but want to know before I order and need more of something that I do not have.

This is the same pen with a bottle holding 5 refills included http://www.amazon.com/SRA-312-No-Clean-Flux-Refill/dp/B008Q1F92E

Can this flux be used to solder 2 pieces of magnet wire together? If not, what flux do I have to use? Thank you a lot!

I'm honestly not to sure what you mean by two magnet wire? I'm imagining you mean joining two solid (magnetic) rods together? In this case I would imagine a 50/50 lead/tin solder however, I'm not sure what the magnetic rods consist of. You may want to consider a mig/tac.

I make jewelry and I need to solder some pieces together. Will this work for it?

This is flux so you would need solder. This is mainly used for electronics

Sra 312 Soldering Flux Pen Low Solids No Clean 10ml | Desertcart British Virgin Islands

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Description

♻️ Solder smarter, cleaner, and greener—your PCB’s new best friend!

NO CLEAN NO FUSS - Halide, resin, and rosin-free formula leaves non-corrosive, non-conductive residues—skip the cleanup.
ECO CHIC COST SAVVY - Refillable pen design reduces waste and saves money—join the green soldering revolution.
MADE IN THE USA QUALITY - Trust in a flux pen crafted to IPC-ANSI-J-STD-004 standards for professional-grade results.
UNIVERSAL COMPATIBILITY - Works seamlessly with both lead and lead-free solders across automotive, telecom, and computing sectors.
PRECISION REWORK MASTERY - Effortlessly touch up SMT, SMD, and through-hole joints with pinpoint accuracy.

The SRA #312 Soldering Flux Pen is a 10ml refillable, no-clean, low-solids flux designed for precise rework on SMT, SMD, and through-hole solder joints. Made in the USA and RoHS compliant, it features an eco-friendly formula free of halides, resin, and rosin, leaving non-corrosive, non-conductive residues that require no post-cleaning. Compatible with lead and lead-free solders, this pen is ideal for automotive, computer, and telecom applications, delivering instant wetting and professional-grade performance.

Specifications

ASIN	B008OC0E5M
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#27,845 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #37 in Soldering Flux #105 in Soldering Parts & Accessories #426 in Welding Equipment & Accessories
Customer Reviews	4.6 4.6 out of 5 stars (1,047)
Date First Available	July 24, 2012
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	0.634 ounces
Item model number	PEN-NC
Manufacturer	SRA
Material	Flux
Part Number	PEN-NC
Product Dimensions	5.4 x 1 x 0.3 inches
Size	No-Clean Pen

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