Silverline 1/4 BSP Air Line Male Thread Quick Coupler - 2 PACK Key Features 1/4 BSP male thread/quick coupler socket. Overall length 70mm. Product Specification Connector Size 6mm Finish Polished Product Weight 0.11kg Thread Size 1/4 BSP Box Contents 2 x Quick couplers ​ Silverline Lifetime Guarantee This Silverline Air Line Quick Coupler 2pk is guaranteed for a period of 30 days from date of purchase against a fault developing in either the materials or the workmanship during manufacture. You can register for your Lifetime guarantee by registering your product online. Any faulty goods will be repaired or replaced free of charge.