Includes length of glue-filled heatshrink, rubber to seal wires, and dielectric grease to protect XT60 and balance plug. Heatshrink is very thick and protects the pack from damage. However this adds about 15g in weight.
4S kit fits packs up to 34x32mm (CNHL 100C 1300mAh) or 38x26mm (Tattu V3.0 1300mAh)
4-6S kit fits pretty much anything else