Product name: easy open pull the product specifications: 3.3 cm in diameter, you can freely adjust the length, maximum 75cm Description: Export button, the product is made up of transparent ABS plastic shell, built-in high elasticity and high performance spring (spring), strong nylon cord freely scalable up to 750MM, loaded metal clip on the back. Product use: in transparent ABS plastic buckle shape design beautiful and generous, positive--LOGO that can be pasted or guests in a specified style, hanging under PVC, phone cord, key rings and other accessories, suitable for all kinds of student cards, membership cards, employee cards, passes and other ancillary uses. , With publicity and advertising, multiple functions such as burglar-proof left. Size: 1pcs/OPP pouches, 100pcs/box 2000pcs/parts (80 kg)