Check the listing for details. Fleck 2510SXT Filter/Air Injection Backwashing Valve Repair Rebuild Kit Seals.... Condition: New. Listed at 189.00 USD. Piston, seal and spacer kit, stuffer tool, PLUS silicone lubricant for the Fleck 2510, 2700, 2750, and 2900 (upper piston only). These wear out over time and can cause your control head to work inefficiently, including constant water down the drain line, poor backwash, incomplete contaminant removal, worn motors, and more. Kit includes complete seal & spacer kit (60121), piston (60090), and stuffer tool (11098) which greatly reduces the time and stress of replacing the seals and spacers without it. Kit also comes with a bonus package of silicone lubricant. This makes DIY very easy and stress free for the homeowner.Complete Valve Repair/Rebuild Kit-Piston, Seals&Spacers, Stuffer Tool to Correctly Place Seals and Spacers, and Silicone Lubricant for Seals&SpacersGenuine Fleck Parts-will stop leaking drain lines, piston getting stuck, etc.Piston-This is a genuine Fleck part# 60090Seals and Spacers-This is a genuine Fleck seal & spacer kit - part# 60121Stuffer Tool-Genuine Fleck stuffer tool - part# 11098