Medical Disposable Blood Collection Needle Sheath
https://www.klstopper.com/product/medical-rubber-products-series/disposable-blood-collection-needle-sheath.html
Medical Disposable Blood Collection Needle Sheath
Spec. Main size (mm)
Length
K20 20.7+0.3
K21-F 21.7土0.3
K22 21.9+0.3
K24-F 21.9+0.3