Set Of Provision Of Trap Chamber For Collecting Coal/Dust Particles In Hhp Locomotives As Per Rdso Modification Sheet No. Mp.Mod.Bk.01.03.21, Rev.00 Dated 23.03.2021. One Consists Of 03 Items As Per Details Following: (1) Female Tee With Union On One Side Only, Size 1 1/4 Inch, Qty. 01 No./(2) 2 Inch Long Female Connector Of Size 1 1/4 Inch, Qty. 01 No.(3) Hex Head Plug Of 1 1/4 Inch, Qty. 01 No./Set.