So its gonna be cold over there so Carry warm clothes , socks and gloves
Milk chocolates to avoid high altitude sickness
Kapoor ( camphor) to smell it while climbing to avoid breathing problems
dry fruits to munch in breaks while climbing
Extra pair of slippers or sandals Good quality of trekking shoes mostly of Quechua Trekking pole
One small bag to use during the time of summit day
Mouthwash Chewing gums if you don't get chance to brush your teeth
Fleece for neck
Don't carry unnecessary things, this are essential things to carry.
You will get all the trekking equipments in the Sankri village itself.Trek leader will tell you to rent it before starting the trek.Say for example, you will get the trekking stick for Rs 50 per day,shoe for Rs 300-350.
Never under estimate the use of trekking tick and shoe.Its a must unless you have the decathlon kind of trekking shoe or stick.
You will understand the use of shoe once you are in snow.