The 3M Ball Marker 1405-XR operates without external power supply and is supplied in boxes of 30 units

see the manufacturer's catalog page:

Standard packaging quantity: 50 pieces per pack

Denne nålefil (rund) er listet som "Needle round file without handle

PV In-Line sikring MC4-EVO2 - PV-K/ILF3 20A Unit(s):Pcs The 3M Ball Marker 1405-XRProduct Overview This inline PV string fuse from Stubli is the MC4 Evo 2 In line Fuse (PV K ILF3) with order number 32. 0330 (PV K 1500ILF3 20 6E 0059). The product features MC4 Evo 2 mating connectors and is intended for use in PV string connections. Function and Identification Product Name: Stubli MC4 Evo 2 In line Fuse (PV K ILF3) Order Number Manufacturer Part: 32. 0330 (PV K 1500ILF3 20 6E 0059) Rated current: 20 A (specified model) Connector