Survivor SportFloor Eco-Lock Isometric Grey 24 in x 24 in x .3 in. Rubber Gym/Weight Room Flooring Tiles (17.4 sq. ft.) (4-Pack) 01040805082X4 - The Home Depot
PaviFlex FitnessPro - Grey Marble Rubber Flooring
Kiefer Specialty Flooring Tuff-Roll™ 4' x 25' Grey Rubber Flooring (100 sq.ft/roll) at Menards®
Amazon.com: MYOYAY Rubber Garage Floor Mat 8.2 X 4 ft Diamond Plate Rubber Flooring Rolls Grey Heavy Duty Garage Flooring Roll Non-Slip Garage Floor Mats for Under Car,Trailer,Gyms : Tools & Home