... ', 4', 5', 6', 2mwring or plain16x162', 3', 4', 5', 6', 2mwring or plain18x182', 3', 4', 5', 6', 2mplain22x222', 3', 4', 5', 6', 2mplain24x242', 3', 4', 5', 6', 2mplain26x262', 3', 4’, 5', 6 ... ', 2mplain30x302', 3', 4’, 5'plainOther specification ...