PBC Linear VR4 025.000 Undrilled Linear Rail, V Guide, Size 4, 25 in Length, 0.437 in Width, Carbon Steel QOB2301021 Series E A Rsoft Yellow Neons Reusability Series E A Rsoft Yellow Neons Reusability Disposable Earplug Material Foam UPC 10080529120639 Noise Reduction Rating NRR 33 dB Cord Options Uncorded Earplug Shape Bullet Noise Reduction Rating 33 dB Earplug Color Yellow Pairs Per Package 200 Insertion Method Roll Down Standards CSA Class AL Metal Detectable No Earplug Pair Pack Type Plastic Bag Earplug Packaging Bulk Box Products By Industry Fabricated Metals Phonebook Access Profile (PBAP) Sound Output Mode Stereo Active Noise Canceling Yes Active Noise Canceling Technology Hybrid Active Noise Cancelling Frequency Response 20 20000 Hz Features Dual driver Rail Finish Cold Roll 314 in Manufacturer Size 4 Type V Guide Rail Material Carbon Steel Raceway 52100 Steel Rail Finish Cold Roll Rail Type Slide Series V Guide Raceway Material 52100 Steel System of Measurement Inch Channel Material Steel Requires Lubrication Lubricant Not Required Load Direction Axial