Ramair sock style air filters, which feature one hole cut out of the foam on the underside of the air filter. The hole is designed so that you can pull the air filter over the top of the trumpets of the carburettor or the engine's air intakes whichever is necessary. They are then secured with cable ties if needed which are included in this sale. They are constructed completely of foam which enables them to locate in the most difficult of areas and gives the most air flow. Supplied with cable ties for easy fitment. Features: High performance twin layer foam Easy to clean using our filter maintenance kit - CK-003 100% hand made in the UK - guaranteed against manufacturing defects for life Long lasting and hard wearing Unit Quantity: No Of Inlets: Inlet Hole Spacing: External Height: External Width: External Length: Filtration Material: Internal Structure: 2 Twin 80mm 93mm 113mm 170mm 15mm Dual Layer Foam N/A