The Original NERBs Shade packs have been put together to give the builder several threads which fade from light to dark. Color preserver must be used as these are embroidery threads which contain silicone. There are 1100 yards per spool and they are only size A.
A detailed article on how to use the shade packs and which ones to buy can be found here: Shade Packs – how to guide
Empty Wood spools – transfer thread from the shade pack spools to these smaller spools so you can wrap in bands of the same color (you should order one small pack of spools per shade pack)
Small pack 20 spools $5
Large pack 100 spools $20 (20% discount)