Bussmann Photovoltaic Solar System Fuse is made for use in solar panel installations. This 4Amp 1,000V specialty fuse is 10 x 38mm and operates in 1-3ms. The fuse is the inline type with solid copper crimp terminals for single conductor 12-10 AWG copper stranded PV. Ours are brand new factory prime and have a white insulated heat shrink molding as shown (we cut it away in one of the pictures so you could see the actual fuse). We are selling one fuse for the price. Brand new, retails for $46.00 each.