Keeping your swim spa in great condition starts with maintaining each of its individual parts. The 30 Amp, FNM30 Fuse for H2X with XP by Master Spas is a replacement power fuse made to go in your swim spa. This particular fuse supplies the power to your swim spa’s propulsion. Often if your swim spa’s propulsion is not working properly, replacing this fuse is a simple, straightforward solution. The 30 Amp, FNM30 Fuse for H2X with XP by Master Spas is a small, affordable and easy to install replacement piece that will ensure your continued enjoyment of your swim spa.