Cardboard Tubes: Assorted Sizes - Set of 25 - STEM

Wholesale Paper Tube Packaging

Economical Kraft mailing tubes are great for document storage or for mailing 3-Ply spiral wound construction for strength It includes white end caps

Aviditi Kraft Mailing Tubes with Caps, 3 x 25, Pack of 24, for Shipping, Storing, Mailing, and Protecting Documents, Blueprints and Posters

py4DSTEM: A Software Package for Four-Dimensional Scanning

30+ Toilet Paper Roll Crafts and Activities for Kids - Happy Hooligans

Small-scale hydroponics

Paper Tubes

White - Paper Tube Co.

How To Make A Cardboard Marble Run - Little Bins for Little Hands

Pom-Pom Drop! - Project Exploration

Large Diameter Postal Tubes

Co-op Cycles Schrader Tube - 700 x 23 - 25 / 28 - 32 / 35 - 43

Urinalysis controls

Boxcar Stem – Paul Component Engineering