• Brand new and high quality.
• Make a hole using 11/32" drill bit at the bottom of PVC， bucket or other containers you find available.
• For use on thin plastic like re-used water bottle cap， 5/16" drill bit might be more apropriate.
• Wind some thread tape and then Screw the nipple into the hole.
• 1 nipple for 2-3 birds.
• Water nipples only work under low pressure ( 5.5 psi or less ).
• Do not conect directly to a garden hose ( house water pressure is around 30 to 75 psi ).
• If you want to have it connected directly to a garden hose then a water pressure reguator is required.
• Size:4.5cm - 1.77inch.

Package Included: 10 pcs x Water Nipples Drinkers