Marshalltown 250-ft White Nylon Mason Line String in the String & Twine department at Lowes.com
What is a brick line? - Wonkee Donkee Tools
An Easy Knot for Stringlines That Unties with a Tug - YouTube
100m Braided Nylon Mason Line Builders Line Chalk Rope Abrasion Rot Mildew Resistant, Masonry Diy Home Decor Crafting Gardening - Cords - AliExpress
Goldblatt Masonry Nylon String Line Set Includes 4 Pieces Braided Mason Line, Fluorescent Colors, 1500Ft in all, 2 Piece Aluminum Adjustable Line Stretchers & 1 Pieces Handy Grout Bag - - Amazon.com
MARSHALLTOWN® - #18 Braided Nylon Mason Line - TOOLSiD.com