premium 4-blade (4 count) replacement cartridges for cobra razors, lequa mermaid razor and headblade premium replacement cartridges **note: must use original blade clip from original manufacturer for this blade to fit. premium quality replacement blades (4-blade cartridges) for the lequa total control razor.. guaranteed fit. these are premium quality blades with lubricating strip (of chamomile, olive oil and allantoin). four cartridges per box..headblade is a registered trademark of headblade inc. cobra razors is a registered trademark of products unlimited, llc. and lequa is a registered trademark of rgc distributors, llc. please review our return policy prior to purchasing these blades are laser sharp and last much longer than originals.