connector can be applied to two-color connectors of the same type of filament material It can weld PLA, ABS filament 1.75mm innovative, easy to use Aluminum alloy material, black treatment, Filaments often lose moisture and become brittle when exposed to air for a long time. To prevent filaments from becoming brittle, please keep them tightly sealed Model: Connector without PLA material Color: red Material: aluminum Size: 1.75mm Package Contents: 2 x Red Filament Welder Connector 2 x Wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.