Check your eligibility criteria for tender Supply of Supply Of Surge Protection Device Spd Type 1 & Type 2 / Class B & C For Single Phase 230V Ac Supply Handling Lightning Surges Of 10/350 Microseconds And Switching Surges Of 8/20 Microseconds Consist Of Two Nos Of B Class L-N, N-E And One No Of C Class L-N With Enclosure Make Equivalent To Obo, Model : 1 Pttbcd Mcd 50-B-Os 320-1 No With Indication, Mcd 125-B/Npe-1 No. V20-C/1- Fs, 320 V-1 No., Enclosure-T250hd Tr-1 No. Hsn Code:8536 Make-Merson, Obo, Pheonix Power.