Monster 821 1200/S 17-20 Silver Astra Topbox Kit

Monster 821 1200/S 17-20 Silver Astra Topbox Kit

Marsoni

M251S

$121.97

Get it in 3 business days with 1 day shipping. Friday, May 29

Monster 821 1200/S 17-20 Silver Astra Topbox KitCoocase ASTRA Basic topbox model specific kits are a sleek rounded design basic box looks better and is more durable than any other available at a similar price This S48BP is silver with smoked lenses, a large box that hides its bulk, with room for two extra large helmets and is 48 litres capacity. A padded inner liner can be purchased as an accessory to provide extra cushioning for helmets or other items stored in the topcase. The ASTRA Basic comes

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Nice shelves. Install was super easy except on one of the three shelves. The main mounting shelf holes were off so the shelf will not slip onto horizontal mounting poles unless I modify the shelf. So a 20 minute job becomes a two hour job. The mounting system does appear very sturdy just not aligned.

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Reviewed in the United States on January 4, 2026

Verified Purchase

Amazon Customer

Port Orchard, US

★★★★★ 5

Great quality!

Color: White

Great quality! Easy to put together!

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Reviewed in the United States on May 12, 2026