supply of set of push button switches with 22.5mm cut out dia, as per specification no. mr / poh / e / t&c / 001, drawing no. mr / poh / 7 / 5 / 0229-2 for ac rakes of kolkata metro. nb: ( 1 ) one set consists of 30nos. green colour push buttons, 34nos. red colour push bottons and 18nos. yellow colour push buttons. ( 2 ) 04nos. push button switches should be provided with 01no. contact element with contact configuration ( 1no. +1nc ) . ( 3 ) the remaining push button switches should be provided with 01no. contact element with contact configuration 2no. as per drg.no. drawing no .mr / poh / 7 / 5 / 0229-2 specn: as per specification no .mr / poh / e / t&c / 001 ( rev-1 ) [ warranty period: 30 months after the date of delivery ]