Lot of 5 Pcs Blue Suction Ball Pipette Dropper Rubber Bulb, Fit for 3ml 5ml 10ml Material: rubber; Color: blueHole inner dia: 7mm/0.28″; Outer dia: 12mm/0.47″Bulb dia: 3.5cm/1.4″; Total length: 5.5cm/2.2″Suitable for all kinds of graduated tube, droppers, pipet, transfer pipette, etcPack of 5 Product description:Material: rubberColor: blueHole inner dia: 7mm/0.28″; Outer dia: 12mm/0.47″Bulb dia: 3.5cm/1.4″; Total length: 5.5cm/2.2″Suitable for students to use in the laboratory Package included:5 x pipette dropper rubber bulb Shipping:* USPS Free Same Day Shipping on orders placed before 3 PM EST* Orders placed after business hours or non-business days will be processed and shipped next business day* We only ship to eBay verified shipping address* Free(2 – 5 Day Standard Shipping) in the US