Pirelli webbing A kiln-dried solid wood frame is corner blocked with reinforced joinery for lasting durability. It is suggested that for an average seat the degree of stretch should be from 7% to 10%. Gives excellent firm resilient support and always returns to original position. Pirelli webbing is made of natural rubber and held in place with wooden dowels or metal clips usually fixed into grooves. Pirelli webbing. 44 /square meter) The Pirelli Rubber Webbing is a high quality, durable material that's used for chair and sofa upholstery. We have Pirelli webbing for sale -2 inches wide black colour rubber webbing. Heavy Duty 50mm Elastic Seat Webbing is designed for robust & firm seating applications and is a modern Pirelli replacement. Black in colour. Sep 26, 2012 ยท When Pirelli webbing reaches that state, it has no stretch and is useless. yvqjoayfeknqkyzqhkoouepukjnzpjdihtgpnrxxmypxthshrxijbpwpvljztlshhslowcype