Some fly tiers want to create and cut their own tubes to desired lengths - and for them, we offer the Pro Sportfisher Classic Tube, extruded style tubing available in a wide variety of colors in four carefully calculated dimensions (Small, medium, Large and XL/Predator). This allows the tier to create tube flies from the smallest Trout or Steelhead flies to large Intruders and beyond! All-Pro Sportfisher Classic tube is sold in either "6-packs" or in the case of the XLpredator "4-packs" where each piece comes packaged straight as opposed to coiled at a length of 20cm/200mm.(7.87in) for a total of 1.2 meters/pack. (47.24in) Small Tubing: requires a Pro Sportfiser her Flexineedle Small...It will fit Classic Small, Medium as well as injection molded Pro 40/40 tubes, Pro Microtubes and Pro Nanotubes. Medium Tubing can be used with either Pro Sportfisher Flexineedle Standard (Large) or Flexineedle Small. Pro Sportfisher Classic Sizing O.D.: Pro Classic Small is 1.4mm O.D. Pro Classic Medium is 2.2mm O.D. Pro classic Large is 3.2 mm O.D. Pro Classic XL/ predator is 4.8mm O.D. **Pro Classic Medium @2.2mm O.D. is the same as the tying surface for Pro 40/40, Pro Micro & Pro Nano. Each previously mentioned tube style fits all Pro Sportfisher weights, cones, discs, heads, and other add-ons**