Attributes . HB . Names

Family (2)   Grade (51)   Hardness (17)   HB Graphite Scale (65)   Keyway (2)   Lead Degree (Hardness) (31)   Lead Hardness (Number) (2)   Lead Type (3)   Material flammability c. (2)   Pencil Lead Degree (Har. (2)   Pencil Refill Grade (1)   Series (90)   UL 94 Flammability Rati. (231)   UL94 class (6)   UL94 Flammability Ratin. (1)