... 2.NRR: 29db 3.Size:2.5*1.2cm 4.Fast rebound Pu foam ear plug pecification: - Material: PU foam- NRR ... :29db- Size: 2.5*1.2cm- Type: Fast rebound- Quality: meet ANSI S3.19 and CE EN 352 ... -2- Shape: bullet,cylinder,bell,etc- Colour: orange,yellow,red,blue,white,pink,green,etc- Packing: 1 pair/polybag,5000pair ... foam bullet shape ear plugs size:2.5*1.2cm fast rebound