A strong filament product line normally combines easy-to-print materials, durable materials and specialty options. PLA+, PETG and TPU cover many mainstream needs when positioned correctly.
PLA+ for broad compatibility
PLA+ is suitable for everyday users, education, prototyping and decorative models. It is often the first product line for new filament brands because users expect easy printing and consistent surface quality.
PETG for stronger functional use
PETG adds toughness and practical durability. It works well for brackets, enclosures, fixtures and parts that need more resistance than standard PLA.
TPU for flexible applications
TPU serves a more specific market: protective covers, flexible accessories and elastic parts. It requires clearer print guidance, but it can make a brand line feel more complete.
For B2B buyers, the right mix depends on target users, local price range, printer compatibility and after-sales tolerance.