The La San Marco bottomless portafilter is designed for espresso machines requiring a 21g basket capacity. This aftermarket filterholder combines Italian manufacturing with a naked design for full visibility during extraction.
Compatible with: La San Marco 100 S and select other models. Not compatible with 85 Flexa, 85 16M, 95 Sprint, or Leva 80.
This portafilter provides a clean, unobstructed view of the espresso puck formation, ideal for baristas perfecting their technique and diagnosing extraction issues.
The LA SAN MARCO Espresso Bottomless filterholder portafilter 21gr Basket is the yin, to your yang. You've found what you're looking for.
Inventory Last Updated: Jul 14, 2026
Inventory Last Updated: Jul 14, 2026