supply of k4 heat sink((aluminium) with fastenerk4 heat sink((aluminium) with fastener,one set consists of a) k4 heat sink (aluminium with fastener) with bridge rectifier asse mbly -01 no bridge rectifier kbpc 3510 or mic mb3510 or similar as per enclosed drg.no.s&t/mft/650 8/adv.1 b) k4 heat sink (aluminium with fastener) with blocking diode assembly-01 no blocking diode -25ns40lp or equivalent - 25amps/400volts as per enclosed drg.no.s&t/mft/6509/ adv.1 as per spe cification no. irs : s89/2013 version 1.0. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]