Medical Devices and Medical Equipment Design Ludwig Katrin Neck Fixer by GuangZhou New-Design Biotechnology Co.,Ltd Breakthrough inbuilt air-inflation, the existing neck fixing products have a set of long inflation tube components which seriously affect the use comfortability of the product. The Ludwig Katrin neck fixer adapts an in-built gasbag and an interior line-hidden structure. Press the gasbag in the center to inflate, and press the exhaust button on the left of the product to exhaust air, hence realizing a convenient wireless portable product experience.