macOS Catalina in easy steps: Covers version 10.15

Foamed Silicone Rubber Seal Strip for CNC Testing Tool - Waterproof & Flexible Sealing Solution (1pc)(Dia 7mm 20m)

1pcs Foamed Silicone Rubber Seal Strip for CNC Testing Tool - Flexible Sealing Solution for Doors/Windows/Appliances,Custom(Dia 3mm 20m)

Foamed Silicone Rubber Seal Strip for CNC Testing Tool - Waterproof, Flexible, and Durable Sealing Solution,1pc(Dia 5mm 10m)

2 Sets of 29-inch Long Black Aluminum Alloy Strip Brushes for Industrial Dust Removal, with Optional Bristle Length, Machine Tools, Waterproof, Easy to Install(H,30mm)

Dust Brush Machine Tool Water Retaining ，Roll Up Door Bottom Aluminum Holding Easy Mounting Exterior(F-Type,Hair Height 60mm)

Foamed Silicone Rubber Seal Strip - Versatile Waterproof Sealing Solution for CNC Testing Tools, Doors, Windows,1pcs(Dia 6mm 20m)

1pc Foamed Silicone Rubber Seal Strip - Versatile Sealing Solution for CNC Testing Tools, Doors, Windows(Dia 8mm 20m)

Foamed Silicone Rubber Seal Strip - Versatile Waterproof Sealing for Tools, Doors, Windows, and More - Customizable Sizes(Dia 6mm 20m)