"The Hesling chain guard Juno 16/18 in black is an essential accessory for your bike. With a length of 422 mm and a height of 145 mm, this chain guard fits perfectly with a RC (right crank) of 285-305 mm. The closed chain guard ensures that your chain is protected from dirt and that your clothes will not be stuck. Product Specifications: - Type: Juno - Primary Basic color: Black - Brand: Hesling - Cash register description: Chaink. Hesl Juno 16/18 - Type of chain guard: Closed - Suitable for wheel size: 16-18