Eberspacher Espar Fuel Tank Standpipe Low Profile - 1 ft long | 221000201600
UK distributor for Eberspacher. Genuine UK dealer warranted replacement part 300mm (1 ft) length 2mm Inside Diameter 4mm Outside Diameter M8 mounting nut - suggested 9-10mm drill hole required only Engine fuel line supply lines remain uncut, no 'T' in required Pick up length 300mm (can be extended using  flexible fuel pipe)
Eberspacher Low Profile Auxillary Heater Fuel Standpipe Genuine Eberspacher replacement product 300mm length  2mm Inside Diameter  4mm Outside Diameter M8 mounting nut - suggested 9-10mm drill hole required only Engine fuel line supply lines remain uncut, no 'T' in required Suitable for Fuel Tank Sender Unit Installation. This item is ideal when the fuel gauge sender unit is accessible on the vehicle Quickly and safely allows fuel pick-up installation without fuel tank removal or interruption of vehicle fuel lines Successful and professional fuel delivery solution for many heaters including Eberspacher D2 Airtronic  Eberspacher D4 Airtronic  Webasto Air top 2000 ST C   Webasto Air top EVO 40
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Heater Fuel Tank Standpipe Kit for Webasto Eberspacher  1320399A Heater Fuel Tank Standpipe for Webasto Air Heaters 
https://www.amazon.com/vdp/08bd1b177a23411db52426e3745607d4?ref=dp_vse_rvc_0 https://www.amazon.com/vdp/065d356d965d4646a9847d5a97ea4e79?ref=dp_vse_rvc_1
Eberspacher
{"Package Dimensions": "12.95 x 3.43 x 0.83 inches", "Item Weight": "1.51 ounces", "Manufacturer": "Eberspacher", "Is Discontinued By Manufacturer": "No", "Date First Available": "November 23, 2016", "Brand": "Espar", "Fit Type": "Vehicle Specific Fit", "Product Grade": "Replacement Part"}