Paint Enamel interior finishing Middle Buff ISC No. 359 as per IS: 5/ 07 to RDSO Specn No. M & C/ PCN/ 120/ 2020 ( Rev. 1 ) with RDSO Amndt. No. 1B as an additional requirement, Packed in 20 Ltrs. new & sound non returnable M. S. Drums to IS: 2552/ 1989 with amndt. 1 of April 1999, Grade B- 1 ( Reaffirmed 2006 ).