uni-ball® - Diamond Leads, 0.7mm, HB, Black, 40/PackHigh performance HB lead refills made with diamond-infused lead. Stronger, long-lasting material resists breakage to produce consistent vivid, dark lines and won't damage or smear documents. Compatible with most refillable mechanical pencils. Lead Degree (Hardness): HB; Lead Color: Black; Refill(s) For: Most refillable mechanical pencils..
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