SET240 Korona Slim White empty Filter Tubes Machine Set | eBay
Cigarette slim cork tubes with gold rings hot foil (RYO)- Natalie
American Aviator 100 XL SLIM White Tipping, extra-long filter, 100 tu, 6,49 €
Rolling Machine Slim Filter - Acti Tube Charcoal - 6 mm - 50 pieces
Someone was asking about this earlier. Here's a side by side picture of standard King Size tube with 20mm filter and a European Slim with a 20mm filter. The slims are 1mm