Seirin B type do not have a guide tube.
The Seirin L Type needle has a coiled metal handle.
Seirin - M Type with Guide Tube, a plain metal handle.
The J type needle has a plastic handle.
The Seirin Pyonex Press needle is colour coded to size.
Spinex Intradermal Needles, available in 3 sizes.
.25x50mm: Seirin M Type metal handle & guide tube. stock: 7