AF21 (FDSD1) and AF22 (FDSD4) are a point detonating fuzes with delay action, distance arming and self-destruction.They are intended for use with 23 mm Round HEI-T and HEI that are fired from 23 mm ARSENAL Air-defence System ADS, ADS-N, 23 mm ZU-23-2, ZU-23-2F and 23 mm ZSU-23-4.AF23 is a point detonating fuze with delay action, distance arming and self-destruction.it is intended for use with 23 mm Round HEI that is fired from 23 GSh-23L, 23 mm AM-23 and 23 mm GSh-6-23M Aircraft guns.AF32 (FDSD2) is a point detonating fuze with delay action, distance arming and self-destruction.It is intended for use with 30 mm Round HE-I and HE-T that are fired from 30 mm automatic guns 2A42 and 2A72. AF34 (FDDA1) is a point detonating fuze with delay action, distance arming and self-destruction.It is intended for use with 30 mm Round HE-I, HEI-T and HE-T that are fired from 30 mm guns type GSH-30, with 30 mm Rounds HEI and HEI-T for Naval Automatic Guns AK-630.The Fuzes are safe at storage and manual operation, and provide rounds safety and functioning at any weather conditions.