Rubber Stopper, White, 1 1/8 in to 1 1/4 in Diameter, Part 20400005590 Description A white tapered rubber stopper designed to seal openings with diameters from 1 1/8 in to 1 1/4 in. Constructed from resilient rubber, this stopper provides a reliable closure for equipment and containers that require a tight, removable seal. Key benefits Secure seal: Tapered profile compresses to fit a range of hole sizes, reducing leaks and preventing contamination or dust entry. Durable material: Flexible rubber withstands repeated installation and removal while maintaining shape and sealing performance. Easy to use: Pushin design requires no tools for installation or removal, saving time during maintenance or setup. Versatile compatibility: Works with laboratory glassware, storage bottles, tubing openings, plumbing test points, and many types of equipment with matching diameter ranges. Visible color: White finish helps with quick identification and visual inspections. Important attributes Function: Provides a removable, tight plug for openings within the specified diameter range. Size: Fits openings from 1 1/8 in to 1 1/4 in diameter. Material: White rubber for flexibility and repeated use. Performance: Maintains a consistent seal across the specified size range and resists deformation from normal handling. Typical applications Laboratory use: Seal flasks, bottles, and other glassware during experiments or storage to limit evaporation and contamination. Maintenance and : Temporarily plug pipe ends, tubing, or test ports during system servicing or pressure testing. Storage and transport: Protect open fittings and delicate components from dust and debris when equipment is stored or . Part information Part number: 20400005590 Color: White Diameter fit range: 1 1/8 in to 1 1/4 in This rubber stopper offers a simple, reliable sealing solution when you need a removable plug that fits a small range of opening sizes and withstands regular use.