4x synchronizers with fixed plates (vacuum). There is a pressure value on the gauge. The maximum pressure is 1KG. If the pressure exceeds or is unstable, the guage can be broke. enable user to hold vacuum values in use.

Adapters Sizes 1: 1.96 in/ 5 cm
Adapters Sizes 2: 2.4 in/ 6 cm
Adapters Sizes 3: 3.9 in/ 10 cm
Adapters Sizes 4: 6.7 in/ 17 cm
Box Color: The color of the box is random
Brand: BFO
Bundle Listing: Yes
Length of Plate: 15.6 in/ 40 cm
Length of Rubber Pipe: 30 in/ 74 cm
Manufacturer Part Number: 5TVJC6
Note: No Instruction included
Operation Cautions: check the description
Package Includes: 4x  synchronizers with fixed plates (vacuum), 4x  rubber pipes (8mm x 5mm x 750mm), 4x  extension tubes(3.9 x 52mm), 4x  extension tubes(3.9 x 122mm), 8x  tubes with conical type connectors( 8mm x 40mm), 4x  tubes 10mm x 53mm ( M6x0.75), 4x  tubes 10x60mm ( M6x1.0)
Type: Carburetor Synchronizer tool