The 1990K490-16A (K490) is a 55% K 54mm 5-grain reloadable composite motor from Cesaroni Technology Incorporated (CTI).
This motor uses an E-Match igniter.
This reload fits a Pro54-5G motor case.
CTI's Green propellant produces a green flame and light smoke.
| Average Thrust: | 488.8640 N | 
| Casing: | Pro54-5G | 
| Certified By: | Canadian Association of Rocketry | 
| Class: | 55% K | 
| Delays: | 6,7,8,9,10,11,12,13,14,15,16 seconds (variable) | 
| Designation: | 1990K490-16A | 
| Diameter: | 54.0000 mm | 
| Formula: | Green | 
| Igniter: | E-Match | 
| Length: | 488.0000 mm | 
| Letter: | K | 
| Manufacturer: | CTI | 
| Name: | K490 | 
| Peak Thrust: | 593.7960 N | 
| Propellant: | APCP | 
| Status: | In-Production | 
| Thrust Duration: | 4.0700 s | 
| Total Impulse: | 1987.7200 Ns | 
| Total Weight: | 1854.1000 g | 
| Type: | Reloadable | 
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