GROCO ARG-3 Strainer Service KitARG 3 Strainer Service Kit ARG Series raw water strainer service kit. Compatible with the Groco ARG 1500, 2015, 2520, 2500, 3015, 3020, 3025 and 3000 series strainers. In the Box: (1) 2 256 Sight Glass O Ring (1) 2 238 Cap O Ring (1) 2 234 Cap O Ring (4) PFW 2 Set Sight Glass Bolt Washer (1) 2 011 Drain Plug O ring Before 08 01 01 (1) 2 111 Drain Plug O ring After 08 01 01 *Sold as an Individual