Davis Ripstop Nylon Air Flow Tels with Adhesive Discs for Sailboats - (2 Pack) Set of 28 Tels.
Lightweight, ripstop nylon Air-Flow Tels attach to sails with waterproof adhesive locator discs. No holes required.
Tels show the air flow across the sails—allowing you to trim sails for maximum performance. Each kit includes 14 Tels and full instructions on where to apply them and how to read them.