Bosch DBW throttle body aluminium (6082) weld on flange with o ring, for 82mm DBW throttle with 75mm bolt spacing 4x m6 threads, 10mm thick flange with o ring groove (87mm ID 3mm CS o ring) 88mm diameter stub on rear 5mm high, Total thickness 15mm. Fits Bosch 0280.750.101 or 0280.750.473 The rear of the flange can be changed to any diameter or need, send me a message if you need something different or a different size flange or material. Please check out my other listings