334 Pieces White Matte Film Bubble Bag Pearl Film Envelope Express Bag Waterproof Bag Envelope Bag 15 * 20 + 4cm Speakers ·The adjustable lowering speed limit

·The adjustable lowering speed limit valve can adjust the lowering speed of the gantry

Storage environment: 14°F~140°F(-10~60℃)<80%RH non-condensing

DcWorking temperature: 0°℃~40°CCorrection function: use sound level calibratorDimensions: 210*68*27mm

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【High-precision measurement】millimeter-level precision measurement

334 Pieces White Matte Film Bubble Bag Pearl Film Envelope Express Bag Waterproof Bag Envelope Bag 15 * 20 + 4cm Speakers ·The adjustable lowering speed limitShips FREE Handling Day: 1 3 Days, Arriving Day: 15 35 Days[SHORTDESCRIPTION] Product Name: kraft paper bubble envelope bag Color: white Product material: outer PE film + inner bubble film Product specifications support multi specification customization The product features moisture proof, fall resistant and portable Self adhesive sealing method Products application logistics, express, mobile phone accessories, cosmetics, clothing, aviation, books,