supply of mechanical lubricator suitable for steam , mechanical lubricator suitable for steam locomotive with 8 ports equivalent to make: nathan model: dv4 (or) make: multip ower international inc. type 8 part no.308 (or) equivalent to nathan model dv4 or multipower international inc type 8 part no 308, final product should be tested in working loco by railway authority in presence of the supplier. note: for material specification, the firm has to submit nabl accredi ted lab test certificate along with the material supply [ warranty period: 30 months after the date of delivery ] ] , mechanical lubricator suitable for steam locomotive with 8 ports equivalent to make: nathan model: dv4 (or) make: multip ower international inc. type 8 part no.308 (or) equivalent to nathan model dv4 or multipower international inc type 8 part no 308, final product should be tested in working loco by railway authority in presence of the supplier. note: for material specification, the firm has to submit nabl accredi ted lab test certificate along with the material supply. [ warranty period: 30 months after the date of delivery ] ]