Thermoplastic Polyurethane Spring Pad (Happy Pad) As Per Rdso Drg No Sk.Vl-291 Alt-3 Or Latest. Drg Attached. Note: 1) Warranty Certificate (Wc) And Test Certificate (Tc) Are Also Requ Ire To Be Supply. 2) Material Must Be Procured From Dlw/Blw Approved Source. ]