24pcs Black Boston Bottle Cap 20 Tooth Phenolic Bakelite Lid Polycone Caps (ID 20mm, OD 23mm)

Specification: Type: Boston Bottle Cap Out diameter: 23mm Inner diameter: 20mm Height: 12mm Material: Bakelite Color: Black Package includes: 24 x Black Boston Bottle Caps With raised ridges all over the circumference, making the lid easier to grasp, this 23mm inside diameter poly nut provides a good seal on the container for your daily use.

• These black lined conical nuts have a 20/400 neck finish , making them ideal for bottles without nuts
• Insert the cone into the sealing area to form a tight seal to prevent liquid leakage, carbonation and gas leakage, thus providing you with a good seal and air tight seal
• Made of high quality Bakelite and polyethylene, it is strong and leak proof when placed on the bottle
• It can provide good torque retention, can be reused and durable, and the polyethylene cover will not rust over time
• The black sealing nut has convex ridge on the whole circumference, which makes it easier to hold and seal