Check the listing for details. Aquasana AQ-UV-L330C-LAMP Compatible NEW Style Replacement Bulb (with slot). Condition: New. Listed at 44.00 USD. Aquasana AQ-UV-L330C Compatible Replacement Bulb for New UV Filter (AQ-UV-10C) Units Made after July 2019This is a Caprock brand lamp that is compatible with the Aquasana AQ-UV-L330C-Lamp and other lamps selling at a much higher price. It is not made by Aquasana. The lamp has a special base with two of the pins recessed in a slot, designed specifically for post-July 2019 "New" AQ-UV-10C and other UV systems made by Aquasana. It measures about 330mm (about 12 inches), excluding the four pins on the end of the lamp. Its peak output is at 254nm. This lamp WILL NOT WORK in systems made before July 2019 that use the AQ-UV-STD. These require a lamp with a different end fitting with two offset pins and two pins on either side: https://www.ebay.com/itm/313009368423 Used in these and other systems:Aquasana AQ-UV-10CUS buyers get FREE SHIPPING to ANY point in the US. Foreign buyers, please request shipping charges prior to bidding. Payment must be received within five days to avoid negative feedback.