Coats 15wt Extra Strong and Upholstery Thread is 100% bonded nylon for machine and hand sewing of upholstery, outdoor and heavyweight fabrics and is weather resistant.
Specifications
3 spools per box, 150yds per spool, 240 spools per case.

Machine needle size: 16 or18. Hand Needle size: 1, 2, 3, 4 or 5.