Tension Control Clamp Kit Why choose us: 1. Tension control clamp holds the top of the filter tank tightly in place. 2. Tank clamp O ring replacement, provides excellent leak proof performance. 3. Widely compatible with many popular brands of pool and spa filters. 4. Made of high quality material, can withstand all kinds of harsh weather conditions. 5. Easy to install, allows you to operate in outdoors. 6. Suitable for most in ground pools. 7. Durable and stable, can be applied for a long time. Specifications: Size: Tension control clamp: 22 1/4 x 23 1/4 x 2 1/4 in/ 56.5 x 59.1 x 5.7 cm Tank clamp O ring outer diameter: 20.5 in/ 52.1 cm Tank clamp O ring inner diameter: 19.5 in/ 49.5 cm Tank clamp O ring wire diameter: 0.5 in/ 1.27 cm Package includes: 1 X Filter pool control clamp 1 X Tank clamp O ring replacement Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.