1.88 in x 15 yd. Check local building codes for HVAC use; Caution: not to be used on heating appliances; Suitable for use at no more than 200 degrees F (93 degrees C); Liability limited to replacement or refund of product cost. Conforms to ASTM D-4236. ?: 1-800-321-0253. DuckBrand.com. Made in USA.