AK50 AK500 AK500/14-OE-11-0.5-R AK500/14-OE-11-1.5-R AK500/14-OE-11-1-R AK500/14-OE-11-2-R AK500/14-OE-5-0.5-R AK500/14-OE-5-1 AK500/14-OE-5-1.5-R AK500/14-OE-5-1-R