Davis Air-Flow Tels - Set of 14 
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.
- Instrument Function: Wind
- Box Dimensions: 2"H x 4"W x 8"L WT: 0.05 lbs
- UPC: 011698009503
Quick Guide (pdf)