<div>Well there are many local manufacturers .. But the one i found most useful is this one since he makes them in all the sizes needed :</div>
<div>TEJCO MKTG </div>
<div>36, Jay-Kay Estate Shashtri Nagar SantaCruz(West) Mumbai -400 054</div>
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<div>email: <a href="mailto:contactus@tejcomagnifier.com">contactus@tejcomagnifier.com</a></div>