48 Spools Threads:
20 Cotona
20 Decora
8 Glamor

The Deco / Overlock Inspirations Incredible features: 20 X 100M COTONA #4 spools, 20 X 100M DECORA # 6spools and 8 X 100M GLAMOUR # 8 spools. The remarkable thread box holds colors separately and allows the spools to be easily removed and replaced.
Specifications
How the Incredible Threadable Box Works Video is on Rayon, not Serger Thread.