6 model

Free

Trefoil Knot

Thingiverse

Free

Trefoil Extruder Movement Visualizer

Thingiverse

Free

Trefoil jar ring holder

Thingiverse

Free

Trefoil Knot-- Parametric Equations

Thingiverse

Free

Radiation Warning Symbol (Trefoil) Keychain

Thingiverse

Free

14th century Trefoil Brooche

Thingiverse