Classic Carder Wide
72 tpi is your standard cloth, perfect for most breeds of sheep fleece and for colour blending. If you're unsure of what you'll be mainly carding always plump for the 72tpi, it's a great all rounder.
48 tpi is for COARSE wools and wild blending of crazy textures and inclusions
120tpi is for FINE wools
Why High Sided?
High Sides allow you to use the carder straight on, with the table of the carder in front of you and the handle to the side. Without high sides, when you turn the handle it is very nearly at the table and will catch your fingers, with high sides there is enough room for your hand and you can therefore card in any position. High sided was an absolute must for me when I bought my Classic Carder and I thoroughly recommend it.
What additional items should I think about?
I really strongly recommend the Classic Carder Finishing Brush which sits on the back of the carder and pushes down all the fluff being carded. This allows you to fit more on, making your carder more economical and the slightly more compressed batts (still very light and airy) seem to come off cleaner.
I also recommend a Porcupine Quill for removing stray bits and cleaning your carder without damaging the tines