--- type: product schema_version: 1 stock_number: "56865-3" canonical_url: "https://www.artisantg.com/TestMeasurement/56865-3/ThorLabs-CM1L20-Extension-Tube-with-C-Mount-and-SM1-Threading" json_url: "https://www.artisantg.com/TestMeasurement/56865-3/ThorLabs-CM1L20-Extension-Tube-with-C-Mount-and-SM1-Threading.json" generated_at: "2026-11-07T03:29:45.617Z" last_updated: "2026-04-30T19:05:39.813-05:00" --- # ThorLabs CM1L20 Extension Tube with C-Mount and SM1 Threading _Summary and Categories are this item's record. The description sections and FAQ are machine-assisted and can contain errors; where they disagree with the record, the record is correct, and where description sections disagree with each other, Details wins._ ## Summary - Manufacturer: ThorLabs - Model: CM1L20 - Condition: Used and in Excellent Condition - Price: Quote only - Availability: Not in Stock - Warranty: 1-Year Warranty with 30-Day Return Guarantee - ITAR restricted: No - Shipping weight: 5 lb - Shipping dimensions: 14X14X6 in ## Categories - Test Equipment > Electrical Test > Electrical Parts (primary) ## Details ### Configuration - Length: 2.19 in (55.6 mm) - SM1 Thread Depth: 2.00 in (50.8 mm) ## Images - - -