This Set is Designed for Wide Mouth Vacuum Sealing Mason Jars with the PSA Adapter and PURE's Plain Mason Jar Lids. What's Included?MVP PumpPSA Wide Mouth Adapter Lid Key 6pc or 12pc, Wide Mouth Plain Stainless Steel Lids  6pc or 12pc, Wide Mouth Stainless Steel Bands 1pc or 2pc, Wide Mouth Lid Organizer Owners’ Manual The Components! The MVP Pump pulls 80-85% (80-85kPa) more Vacuum Than Any Portable Pump on the Market Built to lastHeavy duty construction Simple reliable design One moving part, no batteries or electric pump to fail The PSA Adapter is the Best Adapter on the Market Mason jars are not all the same. PURE designed the PSA Adapter to fit the widest variety of mason jars possible. This means better sealing to more jars at the highest possible vacuum Stay-Tight Triple Thick Stainless Steel 0.4mm Lids with Bands Plain Wide Mouth Lids Super-Strong and unbendable Insert molded silicon gasket Wide Mouth Lid Organizer Each Lid Organizer holds six pieces of lids and bandsInterlocking, snaps together Lid Key, Because the MVP Pump pulls so much vacuum, a lid key is needed to remove the lid. Cleaning,Pump and Lid Key, hand wash with warm soapy water (not dishwasher safe).Adapter, Lids, and Organizer are dishwasher safeMVP Owners Manual, https://cdn.shopify.com/s/files/1/0111/7369/1473/files/PURE_MVP_InstructionManual-2024_11_02_Rev6.5.pdf?v=1734125274