KNOLL - TG 40 referenced impeller product produced by high technology. If you need other products from KNOLL, please send us an inquiry by e-mail. TG 40 referenced product which is satisfy the customer's needs, offers advantages of quality and cost. Thanks to our large disturbiton network, we offer door delivery in most suitable conditions. TG 40 referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.