The following list of PDF feedthrough drawings and STEP (3D CAD Model) downloads is offered for clients who wish to design their own custom flanges. Accu-Glass Products, Inc. does not sell weldable feedthroughs. However, we routinely weld our feedthroughs into customer supplied flanges. Please note that customer supplied flanges must be made from 304 or 316 stainless steel material. We do not weld to Aluminum.