MonoPoly is a reduced-sheen polyester monofilament invisible thread. 2,200 yds. CLEAR. Great for invisible thread applications. MonoPoly is .004" (.1mm) in diameter (90 denier) = Very fine thread.
MonoPoly Invisible Thread - Clear
Thread Magic Thread Conditioner Combo, CLEAR Greece
Superior Threads - Monopoly Clear Spool - 2200 Yards
A Guide to Using Monofilament Thread - WeAllSew
Haberdashery
Invisible Thread - Clear
SHOP Heidi Proffetty
Queen Sized Supreme Slider
12Ct per pack, use to cover thread spools to prevent threads from unraveling and getting twisted together This product is made from nylon This product
Superior Threads NETX Handy Nets Spool Covers, White
Janome Spool stand, 2-spool