Bosch GAS dust extractor hose sizes: 19, 22, 25-35 and 35 mm sleeves and connectors — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/bosch-gas-hose-sizes/  (sheet CC BY 4.0)
Basis: Bosch Professional UK accessory pages; retailer pages for the GAS 35/55 adapter and hose (secondary)
Catalog version: 2026-10-20

Sizes: see table below
- Bosch Professional's pages print a single 'Diameter' for each sleeve and say neither inner nor outer. The connector 1 600 499 005 is a 35 mm to 25 mm reduction adapter; the page prints 25 mm minimum and 35 mm maximum.
- The machine adapter for the GAS 35/55 is described as joining 22 mm and 35 mm; the retailer's text also says 19 mm tubes once, so it is shown as conflicted.
- Bosch does not publish wall thickness, length or bayonet lug sizes on these pages, so no file.
- Only the numbers each source prints are listed, in the source's own words for what they measure. 'Nominal family' is the maker's own size label; it is not a measurement. Hose 'ID / OD' is the hose body, 'cuff / connection' is the end fitting, 'tool or accessory port' is the other side of an adapter. Inch figures are as printed; the mm in brackets are 25.4 mm per inch. A taper is listed only where a source prints it, and none does. Xem does not make these parts; measure your own hose before you size an adapter.

item  nominal family  hose ID  hose OD  cuff / connection  tool or accessory port  taper  source
Hose sleeve 2 607 001 976 (GAS 50)  19 mm  not published  not published  Diameter 19 mm; inner or outer not stated  not published  not published  maker page
Hose sleeve 2 607 001 977 (GCM 12 GDL)  35 mm  not published  not published  Diameter 35 mm; inner or outer not stated  not published  not published  maker page
Adapter 2 607 002 632 (GAS 20 L SFC, GOF 130)  35 mm  not published  not published  not published  Diameter 35 mm  not published  maker page
Connector 1 600 499 005 (GAS 35 and many sanders, saws)  25 to 35 mm  not published  not published  35 mm hose side  25 mm to 35 mm 'diameter' range  not published  maker page
Machine adapter 2608000585 (GAS 35 / 55)  22 / 35 mm  not published  not published  35 mm  22 mm (one line of the page says 19 mm)  not published  secondary
Hose with bayonet 2 608 000 565, 5 m  35 mm  not published  not published  bayonet (size not printed)  not published  not published  secondary

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Bosch Professional (UK): Hose sleeves connecting hoses and power tools: 2 607 001 976 (19 mm), 2 607 001 977 (35 mm), 2 607 002 632 adapter (35 mm) — web — Publisher's page; dimensions are facts — https://www.bosch-professional.com/gb/en/hose-sleeves-connecting-hoses-and-power-tools-2868051-ocs-ac
- Bosch Professional (UK): Connector 1 600 499 005: 35 mm to 25 mm reduction adapter, 25 mm min to 35 mm max — web — Publisher's page; dimensions are facts — https://www.bosch-professional.com/gb/en/connectors-2606779-ocs-ac/
- Klium (retailer, secondary): Bosch 2608000585 machine adapter for GAS 35 / 55: diameter 22 / 35 mm — web — Publisher's page; dimensions are facts — https://www.klium.nl/en/bosch-2608000585-machine-adapter-for-gas-35-55-137433
- ehorst (retailer, secondary): Bosch 2 608 000 565 hose with bayonet, 5 m, 35 mm — web — Publisher's page; dimensions are facts — https://www.ehorst.de/en/Schlauch-mit-Bajonettverschluss-5-m-35-mm-Bosch-2-608-000-565-1271647.html

No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.
API: https://xemstudio.com/api/geometry?object=bosch-gas-hose-sizes