I have used them as spacers on lids/caps that I have drilled holes in to insert sluices. They work great. Ductile enough to fit around the opening and the locks fit snugly to prevent air leaks.
WINKINE Acrylic Riser Display Shelf: Versatile 4-tier Organizer for Perfumes, Amiibo and Funko POP Figures
28 Review
π Bellamei Extra Large Reusable Brew Bags - 2 Pack, 250 Micron Fine Mesh Bags for Fruit Cider Apple Grape Wine Press Straining, Drawstring Brew in a Bag (2 pack-22"Γ26")
27 Review
Nitro-Style Draft Beer Dispenser - FIZZICS DraftPour, Perfect Gift For Homebrewers & Craft Beer Enthusiasts!
37 Review
24-Inch Musical Christmas Tree With Charlie Brown & Linus Blanket - ProductWorks
37 Review
4 Pack 12 Inch Stainless Steel Round Pizza Baking Pan Tray Crisper Sheet Oven Cooking Healthy For Pizzas - Deedro
47 Review
2-Pack European Grade Silicone Bunte Cake Pan Set - Non Stick Bakeware Fluted Tube Mold For Jello, Gelatin & Cakes | 9 Inch Baking Pans | Aokinle | BPA Free
38 Review
PME Scriber Needle Modelling Tool, For Cake Decorating, 5.7-Inch
38 Review
AmazonBasics Silicone Baking Mat Sheet
48 Review