8 mm Pen Needles 31 Gauge, 100 ct, QC95938 Quality Choice Sale! This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. 5/16", single-use, sterile. Intended for use with pen injector devices for the subcutaneous injection of drug, including insulin. Not made with natural rubber latex. Universal fit.