Because this PEEK is part glass filled

High quality titanium alloy nozzle with a ruby ​​gemstone at the tip of the nozzle

tungsten and phosphorescent pigment

2x Nozzles

Creality 3D - CR PLA - Yellow - 1.75mm - 1kg Creality 3D - Ender-3 S1 / Pro - Reservedel Because this PEEK is partFilament from Creality 3D . Not only does Creality 3D produce incredibly popular 3D printers, they also produce quality filament for them. CR PLA 1. 75 is really good quality, with good durability and they come in very unique and strong colors. Specification Brand Name: Creality 3D Material: PLA Shape: Solid Color: Yellow Model Number: PLA 1. 75mm Diameter: 1. 75mm Recommend printing temperature: 190 230 C