Be careful, I've noticed that sometimes the "Frequently Bought Together" options will come up with pencils that are not 0.3 size - keep an eye out for that since the sizes won't work together.
This lead is great for drawing or writing, HB is a firmer lead so it won't break as much but it's still dark enough to resist smudging (all lead is going to potentially smudge a little bit, but a softer lead will be darker and smudge more).
Here's a list of lead grades from firm (lighter writing) to soft (darker writing):
4H - 3H - 2H - H - F - HB - B - 2B - 3B - 4B
There are others but these are more commonly seen ones. Artists would normally be more inclined to go after the softer leads for fill and the harder leads for early sketching.
For standard writing purposes I use HB-Grade which as you can see is pretty much middle of the line, but F-Grade lead is only very slightly harder and lighter so the end result is just about the same.
Good luck with your choice, and I hope this review helped you in some way.
超高聚合物铅笔芯，0.3mm，HB，黑色，12 支装 可重新填充 每个 黑色
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美国亚马逊： 48 条评论
Great lead for 0.3 pencils - Lead Grade Info in Review Below2013年3月23日 - 已在美国亚马逊上发表
firm and dark2018年12月17日 - 已在美国亚马逊上发表
I like the small size and the darkness of the writing or lines that are made with lead. Lead is strong and doesn't break easily like some .5 mm leads
Good ol' Reliable2019年8月27日 - 已在美国亚马逊上发表
Great Lead. Good ol' reliable Pentel.
Less lead than I though it would be but package ...2018年4月21日 - 已在美国亚马逊上发表
Less lead than I though it would be but package came quickly with no lead broken so that's a plus.