Qvrf Relay Switzer Make Model Gm 021-00-Bd-5-Z (- 2.5 To 2.5M Bar) Or Dwyer Model 1910-1 (0.40 To 1.6 Inch Wc) Or Eversure Make Diaphragm Type With Snap Action Mic Ro Switch As Per M/S. Eversure Drg No. Eee/Afr/07. Complying To Rdso/Elrs/Tc/0072 - 2001 (Rev-0). Technical Adoptors For Suction And Blower Pressure Switch Along With Ms Mou Nting Base Heavy Duty Wire Braided Flexible Air Pressure Pipe With Adoptors And Connec Ting Pipe. [ Warranty Period: 30 Months After The Date Of Delivery ] ]