You're looking at a set of 4 12 Volt 18 Ah batteries with Nut/Bolt terminals. The most common use for these batteries is an APC RBC11 power supply. If that's what your buying these for please note - you are only getting the batteries. The wiring and hardware is NOT included. You will have to reuse your existing wiring and hardware. If you want to purchase a completely assembled RBC7, you can buy the RBC11 - UT16CL-B - 12V / 18Ah Sealed Lead Acid UPS Replacement Battery here and keep your hands clean(er).
These sealed lead acid batteries are high-quality, deep-discharge recovery batteries. Their sealed, maintenance-free, easy handling and economical qualities make these long lasting units perfect for your high-tech use.