Here is the partial chart of Aerotech nozzle sizes, the few I have checked were correct.

Reload Nozzle throat diam
H73 0.125
G75 0.156
H112 0.159
H128 0.167
I195 0.180
H97 0.187
H123 0.187
H180 0.203
H238 0.219
I161 0.226
H242 0.234
I211 0.260
I357 0.281
I284 0.281
J350 0.292
I300 0.312
I435 0.315
J570 0.360

Too often, AeroTech reload kits are packed with an incorrect nozzle. Using the reload with the wrong nozzle can cause it to under perform or even to CATO. Before you build that next AeroTech reload, check to make sure the right nozzle is packed in the kit. Measure the diameter of the nozzle and compare it to that listed in the table.

1” Outer diameter EZ Access

Opening Reloads
Small Exit Diameter  
.104 F37W
.125 F62T
.136 G54W, G61W
Medium Exit Diameter  
.141 H73J
.156 G75J
.161 H112J
.172 G104T, G79W
.177 H97J, H242T
Large Exit Diameter  
.180 H128W, H165R, H123W, H148R, I154J, I195J
.213 H180W, H210R
.228 H238T, I161W, I218R
.266 H220T, I357T, I211W, I285R, I284W
.313 I300T

L2 Nozzle

Opening Reloads
.291 I200W, H268R, I366R, I600R, J350W, J420R
.313 I435T
.359 J570W

54MM Medusa

Center Outer Reload
.266   J90W
.213 3@ .161 J180T
.228 2@ .161 J275W, J315R, J135W
.250 3@ .196 J460T
.234 3@ .182 J415W, J540R
.250 6@ .188 J800T
.250 3@ .161 K185W
.266 3@ .213 K550W
.297 6@ .220 K1100T
.266 6@ .199 K700W

New High Power Single Throat

Opening Reload
.455 K695R
.562 K1275R

Submitted by: Steve Pearson