HELIX F 42C, 2-way component system, 4 inch / 100 mm

2-way component system, 4" / 100 mm woofer with a low resonant cone made of injected polypropylene with embedded carbon fibers, 0.75" / 20 mm silk dome tweeter

Helix F 42C — Santa Rosa Cartunes

High-resolution structure of a type IV pilin from the metal-reducing bacterium Shewanella oneidensis, BMC Structural Biology

HELIX F 62C Audiotec Fischer

MATCH MS 42C-BMW.2 2-way component speaker system designed for select BMWs at Crutchfield

4 inch Comp (10cm) Component Systems Speakers - Looking for great Speakers and Subwoofers? Contact Car Audio Direct

HELIX PF K100.2 Pure F-Series 10 cm / 4 2-way component system

Component Sets - High-Fidelity Audio Systems

MATCH UP C42BMW-FRT.2

Component Sets - High-Fidelity Audio Systems

Upgrading the sound system on your Jeep Wrangler TJ, Page 58

HELIX F 62C Audiotec Fischer

42 C to F (42 Celsius to Fahrenheit)

Cole-Parmer Irreversible 1-Point Square Temperature Label, 108F/42C; 50/Pk from Cole-Parmer France

Killark XS-42C Professional Electric Products

A2530-42C - ContiTech Flexsteel 250 EPDM Steam/Crimped MNPT x Wingnut

United States Air Force - General Dynamics F-16D Block 42C