For liner, build-up and concrete/tile pools, with square collar, basket, flange set, skim vac plate d32/38,flange, M5 thread inserts A4 (SS316), screw set, double lip sealings, reductions, 2“/1½“ and overflow connection d50. Incl. notch for niveau sensor. Recommended flow rate 8 m3/h. One skimmer for 25 m2 water surface recommended