cigarette filter ventilation holes Why does the have small around it like in the picture? : r/ Cigarettes What is this dotted line

What is this dotted line for on the filter? : r Cigarettes The use of charcoal in modified cigarette filters for mainstream smoke carbonyl reduction PMC Cut Nic 8 Hole Easy Draw Cigarette Filters 600 Pack 2 Travel Cases BPA Free, Fits Regular & King Size, 8mm : Health & Household Nicrid 8 Hole 600 Disposable Cigarette Filters That Remove Tar, Tar Filters, Reduce Tar, Tar and Toxin Removal, Tar Bars for Cigarettes, Cigarette Filter Tips for Regular and King Size Cigarette

SKU: 50276281011 · From webdevsolutions.tech