NSPA offers many different innovative and some proprietary solutions for your electrical wiring needs. Whatever your installation preference: crimping, soldering, or both; we have the right product for you. We offer a complete line of Sealed Heat Shrink Connectors, quality heat tools and crimp-style installation tools. NSPA also offers a wide variety of spooled, pre-cut, or cut-to-order heat shrink tubing. We have eight different styles of heat shrink tubing with many different colors.