The main pressure sensing film appears to be Fujifilm Prescale. The range of pressures listed above falls directly between two different film ranges. The ranges for different diameters are listed below. For a fairly small diameter the Super Low pressure type is appropriate.
Diameter | Film Type |
d < 1.35 | Low Pressure |
1.35 < d < 3 | Super Low Pressure |
3 < d < 4.768 | Ultra Low Pressure |
d > 4.768 | Extreme Low Pressure |
Specifications links
http://www.sensorprod.com/prescale/product-pages/prescale/prescale-pricing.pdf
http://www.bestech.com.au/wp-content/uploads/brochures/PRESCALE-Product-Guide.pdf
An Amazon link is listed below
https://www.amazon.com/dp/B079C6JR63/ref=cm_sw_r_cp_ep_dp_yTxTBbW2AA2PA