... smoothly and silently closed, to Prevents slamming Shut♦Adjustable Screw is for height adjustable between 0~3mm ♦Plastic Pin is to fix ... for More details:◊New Version of Hydraulic concealed piston:◊Ajustable Screw & plastic Fixing Pin: Price, package and service:1. Packing: ... your cooperation, but freight cost paid from you withou doubt.5. Samples delivery: normally will be ready within 3 working ...