Part Number: 042-1100-008 (38999 ser ii retaining ring)Part Number: 042-1300-008 (38999 ser ii retaining ring)Part Number: 042-1500-008 (38999 ser ii retaining ring)Part Number: 042-1700-008 (38999 ser ii retaining ring)Part Number: 042-1900-008 (38999 ser ii retaining ring)Part Number: 042-2100-008 (38999 ser ii retaining ring)Part Number: 042-2300-008 (38999 ser ii retaining ring)Part Number: 042-2500-008 (38999 ser ii retaining ring)