I am looking for 20cm nylon gear
and 10cm Nylon gear
the big gear must have exactly 2 x the number of teets ar the 10cm gear
I nee 1 x 10 cm, 6 x 20 cm.  The axel is 20mm
I will order another 10 set, but need a test first widt of gear 2-3 cm 
I am flexible +/- 1 cm on diameters
