Protect your household appliances with the Power Gear 30-Amp Fuse Type S/SL with Time Delay, 2 Pack, White. Type S/SL fuses are designed to screw only into adapters of the same amperage in the fuse holders. This prevents mismatching and the possibility of over-fusing a circuit. The time delay prevents fuses from blowing unnecessarily when momentary voltage spikes occur. The fuses in this 30 Amp 2-pack fit standard fuse blocks, and the varying base sizes prevent the use of wrong amperage. For the utmost in reliability, trust GE-branded S/SL Time Delay Fuses.