2 PCS FMFXTR Bicycle Seat Tube Reducer Sleeve Conversion Sleeve, Specification: 30.8mm To 27.2mm

1. Aluminum alloy material, strong and durable, not easy to rust2. Simple installation, convenient and practical3. Use: seat tube reducing sleeve (large to small)4. Material: aluminum alloy5. Specifications: 27.2mm to 25.4mm, 28.6mm to 25.4mm, 28.6mm to 27.2mm, 30.4mm to 27.2mm, 30.8mm to 27.2mm, 31.6mm to 27.2mm, 33.9mm to 27.2mm, 33.9mm to 31.6 mm6. Size: about 6cm/piece7. Weight: 27.2mm to 25.4mm about 11g/pc, 28.6mm to 25.4mm about 20.5g/pc, 30.4mm to 27.2mm about 22g/pc, 30.8mm to 27.2mm about 25g/pc, 31.6mm to 27.2mm about 31g/piece, 33.9mm to 27.2mm about 49g/piece, 33.9mm to 31.6mm about 69g/piece