SELECT p.`part_number`, p.`material`,
CONCAT(p.`length`, p.`length_unit`) AS `tube_length`,
CAST(p.`length` AS UNSIGNED) AS `sort`,
CONCAT(p.`outer_diameter`, p.`diameter_unit`) AS `outer_diameter`,
CONCAT(p.`inner_diameter`, p.`diameter_unit`) AS `inner_diameter`,
p.`type`, p.`thumbnail_outlines`,
CAST( GROUP_CONCAT(j.`gender` SEPARATOR '/') AS CHAR ) AS `luers`
FROM `product` p
LEFT JOIN `product` j ON j.`part_number` REGEXP(p.`luer`)
WHERE p.`type` = 'Standard Pressure Monitoring Line'
AND p.`part_number` NOT LIKE 'fake%'
GROUP BY p.`part_number`
ORDER BY `luers` DESC, p.`outer_diameter` DESC, `sort`