supply of 1) supply of 20 inch slim spun filter items suitable to ro system of 250 lph ro+uv+uf+tds control, make esmartek or equivalent 2) supply of 40/40 ro membrane items suitable to ro system of 250 lph ro+uv+uf+tds control, make esmartek or equivalent. , supply of 20 inch slim spun filter items suitable to ro system of 250 lph ro+uv+uf+tds c ontrol, make esmartek or equivalent [ warranty period: 12 months after the date of delivery ] ] , supply of 40/40 ro membrane items suitable to ro system of 250 lph ro+uv+uf+tds con trol, make esmartek or equivalent. [ warranty period: 12 months after the date of delivery ] ]