Watch Gaskets Waterproof O-Ring Master Assortment (510 Pieces)

This o-ring watch case back seal assortment is the most complete gasket kit available. It is just the assortment that every watchmaker needs because these many gaskets will fit many watches from small ladies’ watches to large gent’s and diver’s watches. These round gaskets are made of solid tube rubber to create an airtight seal and are flexible enough to fit not only round watch case backs but, square, rectangle and other fancy shaped case backs. The thicknesses range from .30 mm to 1.00 mm and the inside diameters range from 12.50 mm to 35.30 mm.

• Kit contains 170 different o-ring sizes in 10 different thicknesses
• **Note** Diameter measured is the interior diameter of the gasket
• In .30 mm thickness there are 8 different sizes: 15, 17, 20, 21, 22, 24, 25, and 26 mm
• In .40 mm thickness there are 19 different sizes: 12.5, 14, 14.5, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, and 30 mm
• In .50 mm thickness there are 23 different sizes: 15, 16, 16.5, 17.5, 18, 19, 20, 20.3, 21, 22, 23, 24, 25, 26, 27, 28, 29, 29.5, 30, 31, 32, 33, and 34.00 mm
• In .60 mm thickness there are 28 different sizes: 10, 14, 15, 16, 17.5, 17.9, 18.5, 19, 19.8, 20, 21, 21.65, 22, 24.5, 25, 26, 27, 28, 28.5, 29, 29.5, 30, 31, 31.5, 32, 33, 33.8, and 34 mm
• In .70 mm thickness there are 25 different sizes: 16.5, 18, 19, 19.6, 21.5, 23, 24.5, 25, 25.5, 26, 27, 27.5, 28, 28.1, 29, 29.4, 29.5, 29.8, 30, 30.2, 30.5, 31, 31.5, 32, and 33 mm
• In .75 mm thickness there are 9 different sizes: 21.6, 26, 27.4, 27.9, 29.1, 29.4, 29.5, 30.8, and 31 mm
• In .80 mm thickness there are 21 different sizes: 18.7, 20.3, 21, 23, 25, 27, 28, 28.5, 29, 29.3, 29.5, 30, 30.5, 31, 31.6, 32, 32.5, 33, 33.9, 34.5, and 29.4 mm
• In .90 mm thickness there are 21 different sizes: 19, 20, 20.6, 25.1, 28, 28.4, 28.6, 29, 29.7, 30, 30.2, 30.6, 31, 31.5, 32, 32.7, 33, 33.5, 34, 34.5, and 35 mm
• In 1.00 mm thickness there are 16 different sizes: 19, 20, 26, 27.5, 28, 28.5, 29.1, 29.3, 30.75, 31, 31.75, 32, 33.75, 34.5, 35.3 and 38 mm
• Contains 3 of each size
• Can easily be reordered by size in the following format: thickness-mm diameter (30-2000)
• Refills are available in packages of 3
• Kit has a total of 510 gaskets
• O-rings fit a variety of watch case backs from round to square
• Maintain airtight seal
• Made of rubber