Napier Power Pellets are now presented pre-treated with Napiers' Power Pellet Lube. Napier lube ensures the correct dose has been applied and that the pellets cannot oxidize in storage, and will perform well in every type of airgun straight from the tin improving accuracy and giving cleaner target patterns. Available in .177 caliber/7.72 grain weight and .22 caliber/15.42 grain weight. Read all manufacturer's warning labels.