H&H Uni-Body 7 speed cassette P/T line

The H&H One-piece (Uni-Body) 7-speed 11-28T or 11-32T cassette is upgrade primarily for the Brompton folding bike's P and T Line models. It is described as a "semi-unibody" cassette, where the larger cogs are milled from a single block of steel, with the smaller cogs being separate.

• Compatibility: This cassette is designed to be used with the stock 4-speed wheelsets found on Brompton P and T Line bicycles.
• Gearing: It features a 7-speed gear progression, with teeth counts of 11-13-15-18-21-24-28T or 32T This offers a wider gear range than the stock 4-speed setup.
• Construction: The larger cogs (optiom 28T and 32T ) are made from precision CNC-machined hardened steel in a unibody design. 
• The smaller cogs (11T, 13T, 15T, and 18T) are separate pieces.
• The 11-28T version weighs 150 grams.
• The 11-32T version weighs 181 grams