Wolfram Products is an American company dedicated to making the highest quality custom Tig products available on the market. All of our products are made in the USA using American sourced materials. Our custom products are made of high quality epoxy resin and heat tested to make sure they withstand the harsh conditions of shop life. Wolfram Products back caps won’t fall apart like some other custom caps have been known to do. We are dedicated to the quality and longevity of our products. Lead time for most custom made caps is 4-8 weeks but may be longer depending on current orders.