Microfilm of Om Mani Padme Hum
The new microfilm has approximately 120 frames per large pendant insert.
Approximately 1,250,000 Om Mani
Padme Hum mantras per 1-1/2 inch pendant insert.

The mantra originated through a process begun by Lama Zopa Rinpoche
when he asked me to write to His Holiness the Dalai Lama to request
a corrected version of Om Mani Padme Hum written in Tibetan.
There was some question as to how the "ni" in Mani is written. There is more info on acquiring microfilm-please click on 'Contact Us' then 'microfilm mantras' sublink at the top of the page.

The photo shows examples of how the rolled scrolls of microfilm will look when you receive them. In this case there are 2 rows (34mm) in height with a diameter of 65mm (2.56 inches). The red tape line indicates the bottom. Here are the 4 Deity mantras I offer. The yellow line indicate manis. The blue upper line are Medicine Buddha mantras. The green upper line are the Green Tara mantras and the white upper line are the 7-Line prayers of Padmasambhava.
If you look closely you can see that there are two pages per frame. To see the individual mantras you need a microscope.
Om Mani Padme Hum - Tibetan script

Inserts are taken from a large core or pancake of microfilm then wound by hand into prayer wheels. (This photo shows a microfilm pancake with rainbow syrup).
Here the microfilm mantras are wrapped around a 3/8" brass tube that has the Life Tree mantras in yellow paper wrapped before the microfilm. This way the scrolls are ready to insert in your prayer wheel as soon as you get them. Plus they are well marked with the red tape line indicating the bottom and a different color for each Deity above.

This prayer wheel is all microfilm. (64 billion mani mantras). The microfilm is protected with colored electrical tape and should last a couple of centuries.
This dharma wheel has an inner core of microfilm that extends out to approx 19 inches then has paper mantras that have strips of cloth between each row protecting them. (Total mani mantras: approx. 12 billion).

This is our electric mantra roller with revolving feeder.

Bird's eye view of wound scrolls of mantras on microfilm-ready for insertion into your prayer wheel.