Wide Compatibility-The tumbler lid 20 oz replacement with 3.15in inner dameter and 3.38in outside diameter is compatible with YETI Rambler, Ozark Trail, Coffee Tumbler and most other glass. Safe Materials-20 oz replacement lid for YETI lids is made of thick solid clear material which is BPA-free and shatter resistant. Stronger Magnetic Force-Each spill proof tumbler cover comes with magnetic sliders replacement for YETI. Don't worry about losing the slider and do not worry about spilling fluids when you are driving or traveling. Good Sealing-The magnetic slider and black silicone O-rings fit your cup snugly to prevent liquid spill and keep your drinks warm/cold for a long time. Easy to Clean-The black magnetic closure removes easily then rinse the lid under running water. Also dishwasher Safe. 4Pack 20 oz Magnetic Tumbler Lid, Replacement Lid for Yeti Lids Compatible with YETI Rambler, Magnetic Spill Proof