Roof Top Blox RTB01 Polypropylene Roof Top Support Block for All Flat Commercial Roofs, 9" x 9", 250 lb. Load at Single Point, Black (Pack of 8) : Amazon.ca: Tools & Home Improvement
Highcraft STC-10 Rooftop Pipe Support Block-Sleeper Curb Replacement-Solid Conduit Standoff Cradle-750 lb. Capacity High Grade Recycled Rubber, 5-3/4 x 9-3/4 in. Without Strut, Black - Amazon.com
Rightline Gear 100K30 Foam Block Car Roof Top Canoe Carrier Rack - Attaches WITH or WITHOUT a Roof Rack Using an Innovative Strap Design!
Rooftop Support | Saddle Pipe Support | Rooftop Block Stand with Pipe Cradle and Sleeper Curb | UV Resistant | Made of 100% Recycled Plastic | Heavy and Extremely Durable, Pipe Supports - Amazon Canada