North Wall Rock Climbing Gym - As promised new volumes on the 33 set! Cool kids dyno to the red volume. | Facebook
Voltomic - 3D Climbing -
What are "Volumes" and why should I care? | // EVO Rock + Fitness - Portland, ME
Amazon.com : Escape Climbing Pyramid Volume | Textured Volume for Rock Climbing and Bouldering Holds | Ideal for Adding New Dimensions to a Climbing Wall | 13 Industrial T-Nuts and 6 Screws
Everything you need to know about volumes – Holds and walls
Volume walking/balancing : r/bouldering
What are "Volumes" and why should I care? | // EVO Rock + Fitness - Portland, ME