Each Small Spool is loaded with 250 grams of 1.75mm flexy 2™ TPU flexible filament. Bigger than our Splash Spools this spool has 5x the amount of filament. The spool measures 6″ x 1.5″ and has a 2″ arbor hole. Slots in the spool allow you to see how much is left. This brand was researched by our team to meet exacting standards for consistent quality. This filament will only work on printers that print with 1.75mm diameter filament. Due to the flexibility of the material, it does not feed well on all 3D printers. Please check your printer specifications before purchasing. Look for new colors coming soon.