Pull-Tite Cord Lock With New Contoured Spring Button  
Description:
·Offers a "no slip" cord-pinching system. ·Actively biased by an all-plastic spring. ·Ideal for 1/8"-3/16" cord.
Material: Acetal(POM)/Nylon(NY)
Size:  Plunger/Housing    
one 3/16'' (5mm)  1-17182/1-04044