Sigma巴斯德吸管

Sigma巴斯德吸管, cotton plugged, L 9 in.

Sigma巴斯德吸管, cotton plugged, L 5 3/4 in.

Sigma巴斯德吸管, non-plugged, L 9 in.

Sigma巴斯德吸管, non-plugged, L 5 3/4 in.