1) Different cap bases, say full lace( French lace or Swiss lace), lace front, or different combined cap base of Mono, PU or other materials, etc at Buyer's option) 2) Indian or Chinese Remy human hair 3) Lengths from 8" to 36" (extra long like 36" depending on materials' availability) 4) Full range of normal colors, bleached knots/high light etc can be done according to customer's requirements. And I believe our excellent knotting method will make a very natural/invisible hairline meeting your requirements.