JAYO Silk Dual Color PLA Filament Black-Purple 1.1kg, Shiny Gradient Dual-Tone PLA, High Gloss Finish, Easy to Print, Layer Concealing, Fits for Most FDM 3D Printers

Multi-pack bundles are the point — buying 4 or 10 spools at once brings the per-kg cost down sharply compared to individual purchases. Good for anyone running the same color through a lot of prints and watching their material budget.