Imagineering, Inc. | https://www.pcbnet.com/specials/offer-1/
. No minimum quantity. Even 1 piece is OK. $25 each for 2 Layers, $50 each for 4 Layers. This offer cannot be combined with any other promotion
Imagineering, Inc. | https://www.pcbnet.com/quote/board-quote-china/?cpn=1
. Special PCB Introductory Offer for new customers only. Free Tooling, Free Shipping. No minimum quantity. Even 1 piece is OK. $25 each for 2 Layers
Imagineering, Inc. | https://www.pcbnet.com/quote/board-quote-usa/?cpn=1
. Special PCB Introductory Offer for new customers only. Free Tooling, Free Shipping. No minimum quantity. Even 1 piece is OK. $25 each for 2 Layers
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_ipc7251_topic1798.xml
: IPC-2221B calculation formula is: Land size, minimum = Hole size + 2*Min. annular ring(Min 0.05mm) + fabrication allowance 
GPD Global | https://www.gpd-global.com/co_website/conformal-simplecoat-specs.php
(18" x 17" x 2.0") Bottom Side Clearance 100 mm (4") Conveyor Conveyor Type Pin Chain Conveyor Width (minimum 50 mm (2") Conveyor Width (maximum) 430 mm (17") Edge Clearance 6 mm
GPD Global | https://www.gpd-global.com/co_website/conformal-simplecoattr-specs.php
") Bottom Side Clearance 100 mm (4") Conveyor Conveyor Type Pin Chain Conveyor Width (minimum 50 mm (2") Conveyor Width (maximum) 394 mm (15.5") Edge Clearance 6 mm
GPD Global | https://www.gpd-global.com/conformal-simplecoat-specs.php
(18" x 17" x 2.0") Bottom Side Clearance 100 mm (4") Conveyor Conveyor Type Pin Chain Conveyor Width (minimum 50 mm (2") Conveyor Width (maximum) 430 mm (17") Edge Clearance 6 mm
GPD Global | https://www.gpd-global.com/conformal-simplecoattr-specs.php
") Bottom Side Clearance 100 mm (4") Conveyor Conveyor Type Pin Chain Conveyor Width (minimum 50 mm (2") Conveyor Width (maximum) 394 mm (15.5") Edge Clearance 6 mm
GPD Global | https://www.gpd-global.com/conformal-coating-equipment.php
(18" x 17" x 2.0") Bottom Side Clearance 100 mm (4") Conveyor Conveyor Type Pin Chain Conveyor Width (minimum 50 mm (2") Conveyor Width (maximum) 430 mm (17") Edge Clearance 6 mm
GPD Global | https://www.gpd-global.com/conformal-coating-machine-tilt.php
") Bottom Side Clearance 100 mm (4") Conveyor Conveyor Type Pin Chain Conveyor Width (minimum 50 mm (2") Conveyor Width (maximum) 394 mm (15.5") Edge Clearance 6 mm