In this catalog, every effort has been made to provide clear Technical Information, descriptions and applications of our products and our literature, to enable you to order by part number. Please order by part number and description whenever possible. This reduces the chance of error from our misunderstanding what you may or may not mean. It allows us to take your order faster with the parts you want, the first time. Many items that have other parts in them are sold out as a kit. Those may also have a GBK or GBS line code and a number. These numbers inventory all of the involved parts and instructions on your order. Do not try to order from any pre-1993 catalog, price sheets or parts brochures without checking this website and any later newsletters/price updates first.