supply of procurement of overhead double-acting concealed door closer mechanism etc.procurement of overhead double-acting concealed door closer mechanism etc.,overhead double acting concealed door closer mechanism as per rcf drg. no. mi0062 32, item no. 18, alt c (small c) or icfs drg. no. icf/sk3-5-6-014, item no. 05, alt-j for swing door en trance to ac area in lhb coaches. rcf approved brand m/s dorma model no. its 96 en 2-4 or m/s ge ze door technology and glass systems, model name geze boxer gr. 2-4 or m/s yale model no. yic 5 324 sl im. [ 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 ] ]