This is your basic spool of leaded solder with a 63/37 water soluble resin core. 0.8mm gauge and 50 grams. This is a good spool for more advanced users that should last 3-6 months depending on how often you solder.
The Spektrum AR620 air receiver is a full-range, 6-channel sport receiver with DSMX/DSM2 compatibility and a compact footprint that’s streamlined to fit in a wide range of models. Great for Robots too!