American Specialty Glass Honey Yellow Size 1 Tumbled Terrazzo Glass - 5 Lbs d9.63 we don’t foresee any issues

we don’t foresee any issues with using a dutch oven directly on the coals at your own risk

Model 421321 Flue Size 13" x 21" Size Width:  11" - 13

UL 103HT Inner Diameter 8" Outer Diameter 11" Height/Length 12" Clearances 1-1/2" Minimum clearance to combustibles Technical Drawings & Dimensions

If using fire glass

American Specialty Glass Honey Yellow Size 1 Tumbled Terrazzo Glass - 5 Lbs d9.63 we don’t foresee any issuesHoney Yellow Size 1 glass can be used for countertops, concrete, DIY Projects, glass aggregates. This glass offers beautiful colors that do not fade or need replacing, they are available in various sizes. Terrazzo glass goes through rigorous tumbling processes in order to ensure precise sizing. ASG terrazzo glass is 100% recycled glass made in the USA. Glass can be used for terrazzo, countertops, aquariums, aquarium gravel, swimming pools, flower