Here's a revised description for your carpet:
"For sale is a grey flecked carpet measuring 15'7" x 13ft. It features a durable 40oz twist pile made from 100% bleach-cleanable polypropylene yarn, making it suitable for heavy domestic use. The carpet comes with a secondary backing and is available for collection in Stowmarket, IP14."
This description provides important details about the carpet's size, material, suitability, and location for potential buyers.