... slider,metal zipper 2.competitive price 3.weight:2g/pcs 500 pcs/lg 4.5YG Double Lock Zip Slider:size: materials ... )b) Lateral strength: >250N (over ASTM F963-96A)c) Reciprocating: >500 cycles8) Standards: American standard ASTM, British standard BS3084-1992, Chinesestandard ... -magnetic, different shapes of pullersavailableInner packing:1,000pcs/poly bag 500 pcs/lg 4.5YG Double Lock Zip Slider