Stainless into aluminum riser?

PYLEX Aluminum Stair Riser - 3 Steps - 7.5 x 10.25 - White 16003

STAINLESS MARINE BBC Gen. III Exhaust Manifold with Aluminum Riser and 5 inch Built to Fit Stainless Steel Tailpipes – 01-3240000-00

EZ-ACCESS FORTRESS 29 in. to 42.5 in. H OSHA Compliant Aluminum 4-Riser Stair System with Grip Grate Tread and Platform FORGG2942 - The Home Depot

16GA Equipment Stand, 30″ Wide, Stainless Steel Base & Bracing,(GS6-SBK) - John Boos & Co

EZ-ACCESS FORTRESS 29 in. to 42.5 in. H OSHA Compliant Aluminum 4-Riser Stair System with Grip Grate Tread and Platform FORGG2942 - The Home Depot

Stainless Fabricators, Inc. Stainless Steel Railing, Cable Railing, Glass Railing, Stair Railing, Guardrail, Handrail, Ornamental Handrail and Railing, Aluminum Railing, Deck Railing

AED Riser Bracket in Stainless Steel for AED Wall Cabinet (Surface Mount) - AED Superstore - AMP1905, 250129-S

Stainless into aluminum riser?

PYLEX Aluminum Stair Riser - 2 Steps - 7.5 x 10.25 - White 16002

Expressly Hubert® Hammered Stainless Steel Square Riser - 12 1/4L x 12 1/4W x 6H

HUBERT Pedestal Display Riser Stainless Steel - 6Dia x 4H : Industrial & Scientific