AK500-OE-6-3-R AK500-OE-7-0.5-R AK500-OE-7-1.5-R AK500-OE-7-1-R AK500-OE-7-2 AK500-OE-7-2-R AK500-OE-8-2 AK500-OE-8-2-R AK500-OE-9-2 AK500-OE-9-2-R