Strong string - This thick string is made of high quality nylon, which is stronger than polypropylene twine. The braided design allows this marking rope to hold up through the harshest conditions! Braided, not twisted - Braided nylon mason line is superior to nylon twisted cord because twisted nylon twine will unravel after being cut. Braided mason line won't fray or unravel when tying knots.
Ace Supply Orange Mason Line String Line - #18 Braided Nylon String - 250 ft Length - Nylon Twine for Gardening or Masonry Tools - Perfect
Anvil 500 ft. Fluorescent Yellow Braided Nylon Mason's Line 57476 - The Home Depot
SGT KNOTS #18 Braided Mason Line - Dacron Polyester Twine for Bead Line & General Purpose Rope (1/2lb x 450ft, NeonPink)
Mason String Line
Braided Nylon Mason Line - Twine Cord (1000 Feet, Fluorescent Orange) : Tools & Home Improvement
Anvil 500 ft. Fluorescent Yellow Braided Nylon Mason's Line 57476 - The Home Depot
Braided Mason Line
Paracord Planet Shock Cord Spools - 50 Ft Lengths of 1/4 Inch
18 Braided Mason Line - Nylon Masonry String – Dependable Expendables
#18 Braided Nylon Mason Line Nylon Twine String for Masonry and Garden Use #18 Braided Line As Constructing Line for String Line (250ft White 2 Pack) : Tools & Home Improvement
Paracord Planet Beading & Jewelry Making in Arts Crafts & Sewing
CORDA #18 x 3000 in. Braided Nylon Mason Line NB7716 - The Home Depot
Mason Twine
Paracord Planet's 125' Micro Cord Spools – 1.18mm Utility Cord