The left hand is also a single membrane with a special application on the inner surface. This application is a mixture of tar, clay and sand (dholak masala) which lowers the pitch and provides a well defined tone.
On the treble drum side, there is no putty added. The nut and bolt version of the dholak is a more modern and better engineered version of the Dholak. Some even call this version a dholki. This item is in the category "Musical Instruments & Gear\Percussion\Folk & World Drums\Dholaks".
The seller is "queenbrass" and is located in this country: CA. This item can be shipped worldwide.