System 30 - Standard Track, 1200 mm, , Screw size M6 Jib The 60 mm Double Cheek

The 60 mm Double Cheek Plain Bearing Block with Quick-Lock is designed to lead lines to winches and allow for them to be temporarily locked with spring-loaded locking arms

The 50 mm Single Becket Cam Plain Bearing Block is designed for medium-sized boats for numerous applications

Ideal for use with mainsail

This is a 22 mm wide and 3000 mm long "Sliding Bolt" track

That means

System 30 - Standard Track, 1200 mm, , Screw size M6 Jib The 60 mm Double Cheek30 mm x 1200 mm long standard track with holes for M6 fasteners. Hole spacing 100 mm. To be combined with System 30 cars and end stops. System 30 is used for medium sized yachts. System: 30 Profile: Standard Length: 1200 mm W: 30 mm H: 17 mm Fasteners: M6 Comment: Hole spacing 100mm