These steel BB's are great for plinking at targets
Umarex ВВs 4.5 mm.
IMPORTANT Info: These BB's are not plastic and will ONLY WORK in airguns designed for steel BB's. The manufacturers describe the BB's as 4.5mm but when measured with a digital caliper they are 4.4mm diameter. They will be NO USE in soft air guns or airguns designed for lead pellets or lead BB's.