Inside diameter is 1-1/8 inches, bottom is about 2 inches outside diameter. Made of durable TPR rubber and reinforced with metal inserts for non-slip grip and longer life.Ideal replacement tips for almost all items used in the bathroom - universal compatibility fits most bath benches, shower chairs. Its unique angled legs with non-slip rubber tips allow the user's weight to be distributed over a larger surface, making the shower chair extremely safe and stable. Tool-free assembly makes it easy for everyone in the family to assemble for use within minutes. These replacement tips are designed to perfectly fit all brands of bath benches and are designed to not only add to but are quick and easy to replace your old tips. Fits all brands of 1-1/8 inch hoses. TPR Rubber is durable and corrosion resistant. Its unique angled legs with non-slip rubber tips allow users' weight to be distributed over a larger area, making the shower stable. Wider tips with convenient drainage holes help manage areas with excess moisture. Unique large drainage holes improve the overall seating experience and also allow water to drain off efficiently, reducing the risk of slipping.